Setup GitHub release action

Author: mgeisler

.github/workflows/prepare-release.yml

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+name: Prepare Release PR
+
+on:
+  push:
+    branches:
+      - 'release-*'
+
+jobs:
+  prepare-release:
+    uses: mgeisler/rust-release-gh-action/.github/workflows/prepare-release.yml@main
+    with:
+      name: "Martin Geisler"
+      email: "mgeisler@google.com"
+      changelog-file: "CHANGELOG.md"
+      changelog-heading-level: "##"

.github/workflows/publish-crate.yml

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+name: Publish Crate
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - Cargo.toml
+
+jobs:
+  publish:
+    uses: mgeisler/rust-release-gh-action/.github/workflows/publish-crate.yml@main
+    secrets:
+      CARGO_TOKEN: ${{ secrets.CARGO_TOKEN }}

CHANGELOG.md

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+# Changelog for PDL
+
+This file lists the most important changes made in each release of PDL.