ci: split workflow into check and build jobs

.forgejo/workflows/ci.yml

@@ -5,7 +5,7 @@ on:
   workflow_dispatch:
 
 jobs:
-  build-and-lint:
+  check:
     name: Lint, Check & Test
     runs-on: nix
 
@@ -16,8 +16,12 @@ jobs:
       - run: nix --version
       - run: nix flake check
 
-      - name: Install the project
-        run: 'nix develop .#impure --command bash -c "uv sync --locked --all-extras --dev"'
+  build:
+    name: Build Package
+    runs-on: nix
 
-      - name: Test with PyTest
-        run: nix develop .#impure --command bash -c "uv run pytest --junit-xml test-report.xml"
+    steps:
+      - name: Check out Repository
+        uses: https://git.konstantinfickel.de/actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
+
+      - run: nix build