add release GitHub action + extract common setup action

.github/actions/setup/action.yml

@@ -0,0 +1,21 @@
+name: Setup
+description: Perform standard setup and install dependencies using pnpm.
+inputs:
+  node-version:
+    description: The version of Node.js to install
+    required: true
+    default: 20.14.0
+
+runs:
+  using: composite
+  steps:
+    - name: Install pnpm
+      uses: pnpm/action-setup@v3
+    - name: Install node
+      uses: actions/setup-node@v4
+      with:
+        cache: pnpm
+        node-version: ${{ inputs.node-version }}
+    - name: Install dependencies
+      shell: bash
+      run: pnpm install

.github/workflows/ci.yml

@@ -17,17 +17,9 @@ jobs:
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
-      - name: Install pnpm
-        uses: pnpm/action-setup@v4
 
-      - name: Install node
-        uses: actions/setup-node@v4
-        with:
-          node-version: "20"
-          cache: "pnpm"
-
-      - name: Install packages
-        run: pnpm install --frozen-lockfile
+      - name: Install dependencies
+        uses: ./.github/actions/setup
 
       - name: Build
         run: |

.github/workflows/release.yml

@@ -0,0 +1,32 @@
+name: Release
+on:
+  push:
+    branches: [main]
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+
+permissions: {}
+
+jobs:
+  release:
+    if: github.repository_owner == 'doubleloop-io'
+    name: Release
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    permissions:
+      contents: write
+      id-token: write
+      pull-requests: write
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install dependencies
+        uses: ./.github/actions/setup
+      - name: Create Release Pull Request or Publish
+        uses: changesets/action@v1
+        with:
+          version: pnpm changeset-version
+          publish: pnpm changeset-publish
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          NPM_TOKEN: ${{ secrets.NPM_TOKEN }}