ci: fix release-plz workflow for auto release on main (#10)

* Create release-plz.yml

* ci: configure release-plz auto-release workflow

* ci: allow crates token from env vars fallback

* ci: add release-pr flow and release commit filtering

.github/workflows/release-plz.yml

@@ -0,0 +1,54 @@
+name: release-plz
+
+on:
+  push:
+    branches:
+      - main
+  workflow_dispatch:
+
+jobs:
+  release-plz-release:
+    name: release-plz release
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    environment: CRATE_RELEASE
+    steps:
+      - &checkout
+        name: Checkout repository
+        uses: actions/checkout@v6
+        with:
+          fetch-depth: 0
+          persist-credentials: false
+
+      - &install-rust
+        name: Install Rust toolchain
+        uses: dtolnay/rust-toolchain@stable
+
+      - name: Run release-plz
+        uses: release-plz/action@v0.5
+        with:
+          command: release
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          CARGO_REGISTRY_TOKEN: ${{ secrets.CARGO_REGISTRY_TOKEN || vars.CARGO_REGISTRY_TOKEN }}
+
+  release-plz-pr:
+    name: release-plz PR
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      pull-requests: write
+    concurrency:
+      group: release-plz-${{ github.ref }}
+      cancel-in-progress: false
+    steps:
+      - *checkout
+      - *install-rust
+      - name: Run release-plz
+        uses: release-plz/action@v0.5
+        with:
+          command: release-pr
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          CARGO_REGISTRY_TOKEN: ${{ secrets.CARGO_REGISTRY_TOKEN || vars.CARGO_REGISTRY_TOKEN }}

release-plz.toml

@@ -0,0 +1,6 @@
+[workspace]
+release_always = true
+git_tag_enable = true
+git_release_enable = true
+publish = true
+release_commits = '^(feat|fix|perf|refactor|revert|build)(\([^)]+\))?(!)?:'