feat: add workflow for building packages

Author: AhmedAmrNabil

.github/workflows/build.yml

@@ -0,0 +1,31 @@
+name: Build packages
+
+on:
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v7
+
+      - uses: cachix/install-nix-action@v31
+
+      - uses: cachix/cachix-action@v17
+        with:
+          name: ahmed-amr
+          authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}
+
+      - run: |
+          nix build \
+            .#spotify-adblock \
+            .#wps-fonts \
+            .#flydigictl \
+            .#apple-fonts \
+            .#claude-desktop \
+            .#open-scq30 \
+            .#gpu-screen-recorder \
+            .#gpu-screen-recorder-notification \
+            .#gpu-screen-recorder-ui \
+            .#prismlauncher-9