ci: Set up release automation with release-plz

.github/workflows/release-plz.yml

@@ -0,0 +1,27 @@
+name: Release automation
+
+on:
+  push:
+    branches:
+      - main
+      - master
+
+jobs:
+  release-plz:
+    name: Release-plz
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          token: ${{ secrets.RELEASE_PLZ_TOKEN }}
+
+      - name: Install Rust toolchain
+        uses: dtolnay/rust-toolchain@stable
+
+      - name: Run release-plz
+        uses: MarcoIeni/[email protected]
+        env:
+          GITHUB_TOKEN: ${{ secrets.RELEASE_PLZ_TOKEN }}
+          CARGO_REGISTRY_TOKEN: ${{ secrets.CARGO_REGISTRY_TOKEN }}

cliff.toml

@@ -30,7 +30,7 @@ header = """
 
 All notable changes to this project will be documented in this file.
 
-The format is similar to [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+The format is similar to [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).\n
 """
 body = """

release-plz.toml

@@ -0,0 +1,8 @@
+# release-plz configuration. https://release-plz.ieni.dev/docs/config
+[workspace]
+changelog_config = "cliff.toml"
+changelog_update = true
+git_tag_enable = true
+git_release_enable = true
+pr_labels = ["release"]
+semver_check = true