Fix: modularize CI workflows

.github/workflows/build-cross.yml

@@ -0,0 +1,49 @@
+name: Build Cross (Linux ARM64)
+
+on:
+  workflow_call:
+  workflow_dispatch:
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    timeout-minutes: 45
+
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: recursive
+
+      - name: Install Rust toolchain
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          targets: aarch64-unknown-linux-gnu
+
+      - name: Cache Rust dependencies
+        uses: Swatinem/rust-cache@v2
+        with:
+          key: aarch64-unknown-linux-gnu
+
+      - name: Install cross
+        run: cargo install cross --git https://github.com/cross-rs/cross
+
+      - name: Build
+        run: cross build --release --target aarch64-unknown-linux-gnu
+
+      - name: Build desktop
+        run: cross build --release --features desktop --bin cagire-desktop --target aarch64-unknown-linux-gnu
+
+      - name: Upload CLI artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: cagire-linux-aarch64
+          path: target/aarch64-unknown-linux-gnu/release/cagire
+
+      - name: Upload desktop artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: cagire-linux-aarch64-desktop
+          path: target/aarch64-unknown-linux-gnu/release/cagire-desktop