chore: swap publish-crates for release-plz (#82)

The workflow on release-plz is pretty great. I'm not sure if it works
exactly the way I want it to, but there's one way to find out.

.github/workflows/release.yml

@@ -0,0 +1,33 @@
+name: release-plz
+
+permissions:
+  pull-requests: write
+  contents: write
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  release-plz:
+    name: Release-plz
+    runs-on: ubuntu-latest
+    steps:
+      - name: Generate GitHub token
+        uses: actions/create-github-app-token@v1
+        id: generate-token
+        with:
+          app-id: ${{ secrets.RELEASE_APP_ID }} 
+          private-key: ${{ secrets.RELEASE_APP_PRIVATE_KEY }} 
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - name: Install Rust toolchain
+        uses: dtolnay/rust-toolchain@stable
+      - name: Run release-plz
+        uses: MarcoIeni/[email protected]
+        env:
+          GITHUB_TOKEN: ${{ steps.generate-token.outputs.token }}
+          CARGO_REGISTRY_TOKEN: ${{ secrets.CARGO_REGISTRY_TOKEN }}

.github/workflows/rust.yml

@@ -1,4 +1,4 @@
-name: Rust
+name: rust
 
 on:
   push: