chore: update .gitignore and add R2 upload script for artifact management

- Added .automaker/images/ to .gitignore to prevent tracking of generated images.
- Deleted obsolete agent-output.md and feature.json files related to removed "Agent Tools" feature.
- Introduced a new script for uploading build artifacts to R2 and updating releases.json.
- Enhanced GitHub Actions workflow to include artifact uploads for different platforms.

.github/workflows/release.yml

@@ -19,10 +19,13 @@ jobs:
         include:
           - os: macos-latest
             name: macOS
+            artifact-name: macos-builds
           - os: windows-latest
             name: Windows
+            artifact-name: windows-builds
           - os: ubuntu-latest
             name: Linux
+            artifact-name: linux-builds
 
     runs-on: ${{ matrix.os }}
 
@@ -78,3 +81,59 @@ jobs:
           prerelease: false
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Upload macOS artifacts for R2
+        if: matrix.os == 'macos-latest'
+        uses: actions/upload-artifact@v4
+        with:
+          name: ${{ matrix.artifact-name }}
+          path: apps/app/dist/*.dmg
+          retention-days: 1
+
+      - name: Upload Windows artifacts for R2
+        if: matrix.os == 'windows-latest'
+        uses: actions/upload-artifact@v4
+        with:
+          name: ${{ matrix.artifact-name }}
+          path: apps/app/dist/*.exe
+          retention-days: 1
+
+      - name: Upload Linux artifacts for R2
+        if: matrix.os == 'ubuntu-latest'
+        uses: actions/upload-artifact@v4
+        with:
+          name: ${{ matrix.artifact-name }}
+          path: apps/app/dist/*.AppImage
+          retention-days: 1
+
+  upload-to-r2:
+    needs: build-and-release
+    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"
+
+      - name: Download all artifacts
+        uses: actions/download-artifact@v4
+        with:
+          path: artifacts
+
+      - name: Install AWS SDK
+        run: npm install @aws-sdk/client-s3
+
+      - name: Upload to R2 and update releases.json
+        env:
+          R2_ACCOUNT_ID: ${{ secrets.R2_ACCOUNT_ID }}
+          R2_ACCESS_KEY_ID: ${{ secrets.R2_ACCESS_KEY_ID }}
+          R2_SECRET_ACCESS_KEY: ${{ secrets.R2_SECRET_ACCESS_KEY }}
+          R2_BUCKET_NAME: ${{ secrets.R2_BUCKET_NAME }}
+          R2_PUBLIC_URL: ${{ secrets.R2_PUBLIC_URL }}
+          RELEASE_VERSION: ${{ github.event.inputs.version || github.ref_name }}
+          GITHUB_REPOSITORY: ${{ github.repository }}
+        run: node .github/scripts/upload-to-r2.js