ci: install cargo dependencies before building workspace

.github/workflows/build.yml

@@ -20,6 +20,14 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
+     - name: Install Nix
+       uses: DeterminateSystems/nix-installer-action@main
+        with:
+          logger: pretty
+
+     - name: Get build dependencies
+       run: "nix develop .#"
+
       - uses: actions-rs/toolchain@v1
         with:
           toolchain: stable