Merge pull request #5 from OpenDreamProject/linting

Adds a linting CI

.github/workflows/ci.yml

@@ -0,0 +1,37 @@
+name: CI
+on:
+  workflow_dispatch:
+  pull_request:
+    branches:
+      - master
+  push:
+
+jobs:
+  run_lints:
+    name: Run linters
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v3
+      - name: Python setup
+        uses: actions/setup-python@v4
+        with:
+          python-version: "3.11"
+      - name: Install poetry
+        run: |
+          python -m pip install -U poetry
+      - id: cache-poetry
+        uses: actions/cache@v3
+        with:
+          path: ~/.cache/pypoetry/virtualenvs
+          key: ${{ runner.os }}-poetry-${{ hashFiles('**/poetry.lock') }}
+      - name: Install dependencies
+        if: steps.cache-poetry.outputs.cache-hit != 'true'
+        run: |
+          poetry install
+      - uses: actions/cache@v3
+        with:
+          path: ~/.cache/pre-commit
+          key: ${{ runner.os }}-pre_commit-${{ hashFiles('.pre-commit-config.yaml') }}
+      - name: Pre-commit linters
+        run: |
+          poetry run pre-commit run --show-diff-on-failure --color=always --all-files