feat: Auto-format Nix files using Alejandra

Author: l0b0

.pre-commit-config.yaml

@@ -2,6 +2,11 @@
 # Please run `pre-commit run --all-files` when adding or changing entries.
 
 repos:
+  - repo: https://github.com/kamadorueda/alejandra
+    rev: bb7f2ad3f176aa8e9e2944a10061f7989c8fef17 # frozen: 1.3.0
+    hooks:
+      - id: alejandra
+
   - repo: https://github.com/pre-commit/mirrors-prettier
     rev: 6f3cb139ef36133b6f903b97facc57b07cef57c9 # frozen: v3.0.0-alpha.6
     hooks: