Experimental build all action

.github/workflows/build-all.yml

@@ -0,0 +1,62 @@
+name: Build All
+
+on: workflow_dispatch
+
+jobs:
+  build-android-and-desktop-linux:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup build environment
+        uses: actions/setup-java@v4
+        with:
+          java-version: '17'
+          distribution: 'temurin'
+          cache: gradle
+
+      - name: Build
+        run: |
+          chmod +x gradlew
+          # ./gradlew app:assembleFdroidRelease
+          # ./gradlew core:packageReleaseUberJarForCurrentOS
+
+      - name: Upload Android Build
+        uses: actions/upload-artifact@v4
+        with:
+          name: android
+          path: build.gradle.kts
+          retention-days: 1
+
+      - name: Upload Desktop Build
+        uses: actions/upload-artifact@v4
+        with:
+          name: linux
+          path: gradle.properties
+          retention-days: 1
+
+  build-desktop-windows:
+    runs-on: windows-latest
+    steps:
+      - name: Build
+        run: echo "Windows Build TODO" > windows.txt
+
+      - name: Upload Desktop Build
+        uses: actions/upload-artifact@v4
+        with:
+          name: windows
+          path: windows.txt
+          retention-days: 1
+
+  publish:
+    needs: [ build-android-and-desktop-linux, build-desktop-windows ]
+    runs-on: ubuntu-latest
+    steps:
+      - name: Downloading artifacts
+        uses: actions/download-artifact@v4
+
+      - name: Upload artifacts to release
+        run: |
+          echo "TODO, placeholder"
+          ls