feat: Keyring backend for pip auth with ADO feeds

.github/workflows/release-keyring.yaml

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+name: Artifacts Helper Keyring Releases
+
+on:
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    defaults:
+      run:
+        working-directory: src/artifacts-helper/codespaces_artifacts_helper_keyring
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: wntrblm/nox@main
+        with:
+          python-versions: "3.11, 3.12"
+
+      - name: Setup PDM
+        uses: pdm-project/setup-pdm@v4
+        with:
+          version: "2.15.1"
+          python-version-file: "src/artifacts-helper/codespaces_artifacts_helper_keyring/pyproject.toml"
+
+      - name: Run nox release
+        run: pdm release
+
+      - name: Upload build artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: codespaces_artifacts_helper_keyring
+          path: |
+            src/artifacts-helper/codespaces_artifacts_helper_keyring/dist

.github/workflows/test-keyring.yaml

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+name: Artifacts Helper Keyring Tests
+
+on:
+  push:
+    paths:
+      - ".github/workflows/test-keyring.yaml"
+      - "src/artifacts-helper/codespaces_artifacts_helper_keyring/**"
+
+  pull_request:
+    branches:
+      - main
+    paths:
+      - ".github/workflows/test-keyring.yaml"
+      - "src/artifacts-helper/codespaces_artifacts_helper_keyring/**"
+
+defaults:
+  run:
+    working-directory: src/artifacts-helper/codespaces_artifacts_helper_keyring
+
+jobs:
+  generate-jobs:
+    name: Generate jobs
+    runs-on: ubuntu-latest
+    outputs:
+      session: ${{ steps.set-matrix.outputs.session }}
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: wntrblm/nox@main
+        with:
+          python-versions: "3.12"
+
+      - id: set-matrix
+        shell: bash
+        run: echo session=$(nox --json -l --tags ci | jq -c '[.[].session]') | tee --append $GITHUB_OUTPUT
+
+  checks:
+    name: Session ${{ matrix.session }}
+    needs: [generate-jobs]
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        session: ${{ fromJson(needs.generate-jobs.outputs.session) }}
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: wntrblm/nox@main
+        with:
+          python-versions: "3.8, 3.9, 3.10, 3.11, 3.12, pypy-3.9, pypy-3.10"
+
+      - name: Setup PDM
+        uses: pdm-project/setup-pdm@v4
+        with:
+          version: "2.15.1"
+          python-version-file: "src/artifacts-helper/codespaces_artifacts_helper_keyring/pyproject.toml"
+
+      - name: Run ${{ matrix.session }}
+        run: pdm run nox --error-on-missing-interpreters --error-on-external-run -s "${{ matrix.session }}"

src/artifacts-helper/codespaces_artifacts_helper_keyring/.gitignore

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+### Python ###
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+cover/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+.pybuilder/
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+#   For a library or package, you might want to ignore these files since the code is
+#   intended to run in multiple environments; otherwise, check them in:
+# .python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
+#   install all needed dependencies.
+#Pipfile.lock
+
+# poetry
+#   Similar to Pipfile.lock, it is generally recommended to include poetry.lock in version control.
+#   This is especially recommended for binary packages to ensure reproducibility, and is more
+#   commonly ignored for libraries.
+#   https://python-poetry.org/docs/basic-usage/#commit-your-poetrylock-file-to-version-control
+#poetry.lock
+
+# pdm
+#   Similar to Pipfile.lock, it is generally recommended to include pdm.lock in version control.
+#pdm.lock
+#   pdm stores project-wide configurations in .pdm.toml, but it is recommended to not include it
+#   in version control.
+#   https://pdm.fming.dev/#use-with-ide
+.pdm.toml
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow and github.com/pdm-project/pdm
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+# pytype static type analyzer
+.pytype/
+
+# Cython debug symbols
+cython_debug/
+
+# PyCharm
+#  JetBrains specific template is maintained in a separate JetBrains.gitignore that can
+#  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
+#  and can be added to the global gitignore or merged into this file.  For a more nuclear
+#  option (not recommended) you can uncomment the following to ignore the entire idea folder.
+#.idea/
+
+### Python Patch ###
+# Poetry local configuration file - https://python-poetry.org/docs/configuration/#local-configuration
+poetry.toml
+
+# ruff
+.ruff_cache/
+
+# LSP config files
+pyrightconfig.json
+
+# PDM
+.pdm-python
+
+### macOS ###
+# General
+.DS_Store
+.AppleDouble
+.LSOverride
+
+# Icon must end with two \r
+Icon
+
+# Thumbnails
+._*
+
+# Files that might appear in the root of a volume
+.DocumentRevisions-V100
+.fseventsd
+.Spotlight-V100
+.TemporaryItems
+.Trashes
+.VolumeIcon.icns
+.com.apple.timemachine.donotpresent
+
+# Directories potentially created on remote AFP share
+.AppleDB
+.AppleDesktop
+Network Trash Folder
+Temporary Items
+.apdisk
+
+### macOS Patch ###
+# iCloud generated files
+*.icloud
+
+### Windows ###
+# Windows thumbnail cache files
+Thumbs.db
+Thumbs.db:encryptable
+ehthumbs.db
+ehthumbs_vista.db
+
+# Dump file
+*.stackdump
+
+# Folder config file
+[Dd]esktop.ini
+
+# Recycle Bin used on file shares
+$RECYCLE.BIN/