added pre and post commit hooks to run linting

hooks/post-commit

@@ -0,0 +1,3 @@
+#!/usr/bin/env bash
+
+git stash pop -q

hooks/pre-commit

@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+
+git stash -q --keep-index
+
+./lint.sh
+
+RESULT=$?
+
+git add -u
+
+exit $RESULT

lint.sh

@@ -0,0 +1,3 @@
+#!/usr/bin/env bash
+
+nix run git+https://github.com/kamadorueda/alejandra -- -q .