feat: add auto lint workflow

.github/workflows/nix-lint.yaml

@@ -0,0 +1,46 @@
+name: Nix Flake Check
+
+on: [pull_request]
+
+jobs:
+  check:
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: write
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v2
+
+    - name: Install Nix
+      uses: cachix/install-nix-action@v23
+      with: 
+        nix_path: nixpkgs=channel:nixos-unstable
+
+    - name: Install Nix Linting and Formatting Tools
+      run: nix-env -i statix nixpkgs-fmt -f '<nixpkgs>'
+
+    - name: Run Statix Lint
+      run: statix fix
+
+    - name: Run Nix Format
+      run: nix fmt
+
+    - name: Nix Flake Checker
+    # You may pin to the exact commit or the version.
+    # uses: DeterminateSystems/flake-checker-action@4b90f9fc724969ff153fe1803460917c84fe00a3
+      uses: DeterminateSystems/flake-checker-action@v5
+
+    - name: Set up Python
+      uses: actions/setup-python@v3
+      with:
+        python-version: '3.x'
+
+    - name: Generate Readme
+      run: python3 sh/readme.py
+
+    - name: Commit
+      uses: stefanzweifel/git-auto-commit-action@v5
+      with:
+        commit_message: Auto lint/format