chore: add release-plz workflow for automated releases

.github/workflows/release.yml

@@ -0,0 +1,24 @@
+name: Release
+
+on:
+  push:
+    branches: [main]
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  release-plz:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+        with:
+          fetch-depth: 0
+
+      - uses: dtolnay/rust-toolchain@stable
+
+      - uses: MarcoIeni/release-plz-action@v0.5
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          CARGO_REGISTRY_TOKEN: ${{ secrets.CARGO_REGISTRY_TOKEN }}

release-plz.toml

@@ -0,0 +1,15 @@
+[workspace]
+# Only release the patchbay crate (not runner, vm, cli, server, utils).
+release = false
+publish = false
+
+[changelog]
+# Use the existing cliff.toml for changelog generation.
+config = "cliff.toml"
+
+[[package]]
+name = "patchbay"
+release = true
+publish = true
+# Tag format matching existing convention.
+git_tag_name = "patchbay-v{{ version }}"