Add Changesets release workflow with npm trusted publishers (#273)

* feat: make changeset file trigger release pr

* fix: only run release when changeset present or version changed

* chore: use official changesets/action for releases

- Simplify release workflow to use changesets/action
- Uses trusted publishers (no NPM_TOKEN needed)
- Removes manual changeset check (action handles it)

* fix: add id-token for npm trusted publishers

Author: ryanseddon

.github/workflows/ci.yml

@@ -34,15 +34,3 @@ jobs:
           cache: 'npm'
       - run: npm install
       - run: npm run build
-
-  changeset:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - name: Check for changeset
-        run: |
-          if [ ! -f ".changeset/"* ]; then
-            echo "::warning::No changeset found. Consider adding one using 'npx changeset'"
-          else
-            echo "Changeset found ✓"
-          fi

.github/workflows/release.yml

@@ -5,22 +5,32 @@ on:
     branches:
       - main
 
-permissions:
-  id-token: write
-  contents: read
+concurrency: ${{ github.workflow }}-${{ github.ref }}
 
 jobs:
   release:
+    name: Release
     runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      id-token: write
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - name: Checkout Repo
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
         with:
           node-version: 22
           cache: 'npm'
-      - run: npm install
-      - run: npm run release
-      - name: Publish to npm
-        run: npm run publish:changesets
+          registry-url: 'https://registry.npmjs.org'
+
+      - name: Install Dependencies
+        run: npm install
+
+      - name: Create Release Pull Request
+        uses: changesets/action@v1
+        with:
+          publish: npm run publish:changesets
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}