chore(launcher): Electron-only distro, CI sync with Windows pack

.github/workflows/fractured-launcher-ci.yml

@@ -0,0 +1,52 @@
+# Verifies Electron launcher Windows pack and uploads installers for testing.
+
+name: Fractured launcher CI
+
+on:
+  workflow_dispatch:
+  push:
+    branches: [master, main]
+    paths:
+      - 'tools/fractured-launcher-electron/**'
+      - '.github/workflows/fractured-launcher-ci.yml'
+  pull_request:
+    paths:
+      - 'tools/fractured-launcher-electron/**'
+      - '.github/workflows/fractured-launcher-ci.yml'
+
+permissions:
+  contents: read
+
+concurrency:
+  group: fractured-launcher-ci-${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  electron-launcher:
+    runs-on: windows-latest
+    timeout-minutes: 45
+    defaults:
+      run:
+        working-directory: tools/fractured-launcher-electron
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+          cache: npm
+          cache-dependency-path: tools/fractured-launcher-electron/package-lock.json
+
+      - name: Install and pack (NSIS + portable)
+        run: |
+          npm ci
+          npm run pack:win
+
+      - uses: actions/upload-artifact@v4
+        with:
+          name: fractured-launcher-electron-windows-${{ github.run_id }}
+          if-no-files-found: warn
+          path: |
+            tools/fractured-launcher-electron/dist/*.exe
+            tools/fractured-launcher-electron/dist/latest.yml
+            tools/fractured-launcher-electron/dist/*.blockmap