ci: add release workflow to publish kompkit-core to npm and pub.dev on release branch

Author: Ivanmw97

.github/workflows/release.yml

@@ -0,0 +1,83 @@
+name: Release
+
+on:
+  push:
+    branches: [release]
+    paths:
+      - "packages/core/web/**"
+      - "packages/core/flutter/**"
+      - ".github/workflows/release.yml"
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+concurrency:
+  group: release
+  cancel-in-progress: false
+
+jobs:
+  publish-npm:
+    name: Publish to npm (kompkit-core)
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: "20.x"
+          registry-url: "https://registry.npmjs.org"
+          cache: "npm"
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Build
+        run: npm run build:web
+
+      - name: Run tests
+        run: npm run test:web
+
+      - name: Publish to npm
+        run: npm publish --access public
+        working-directory: packages/core/web
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
+
+  publish-pub:
+    name: Publish to pub.dev (kompkit_core)
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup Flutter
+        uses: subosito/flutter-action@v2
+        with:
+          flutter-version: "3.27.4"
+          channel: "stable"
+
+      - name: Get dependencies
+        working-directory: packages/core/flutter
+        run: flutter pub get
+
+      - name: Analyze
+        working-directory: packages/core/flutter
+        run: flutter analyze
+
+      - name: Run tests
+        working-directory: packages/core/flutter
+        run: flutter test
+
+      - name: Setup pub credentials
+        run: |
+          mkdir -p $HOME/.config/dart
+          echo '${{ secrets.PUB_CREDENTIALS }}' > $HOME/.config/dart/pub-credentials.json
+
+      - name: Publish to pub.dev
+        working-directory: packages/core/flutter
+        run: dart pub publish --force