Add manual build back

Author: SeanLeRoy

.github/workflows/manual-build.yml

@@ -0,0 +1,45 @@
+name: manual-build
+
+on:
+  workflow_dispatch:
+    inputs:
+      os:
+        description: "Operating System"
+        required: true
+        type: choice
+        options:
+          - ubuntu-latest
+          - windows-latest
+          - macos-latest
+
+jobs:
+  build:
+    runs-on: ${{ github.event.inputs.os }}
+
+    steps:
+      - name: Check out Git repository
+        uses: actions/checkout@v4
+
+      - name: Install Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 18
+
+      - name: Build/release Electron app
+        uses: AllenCellSoftware/action-electron-builder@fms-file-explorer
+        env:
+          AMPLITUDE_API_KEY: ${{ secrets.AMPLITUDE_API_KEY }}
+        with:
+          github_token: ${{ secrets.github_token }}
+          package_root: "packages/desktop"
+          release: false  # No release, just build
+          windows_certs: ${{ secrets.CSC_LINK }}
+          windows_certs_password: ${{ secrets.CSC_KEY_PASSWORD }}
+
+      - name: Upload build artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: electron-build-${{ github.event.inputs.os }}
+          path: |
+            packages/desktop/build
+          retention-days: 7  # Artifacts will be stored for 7 days