chore: add lint-staged with pre-commit hooks for src/ directory

.husky/post-checkout

@@ -0,0 +1 @@
+npm install

.husky/pre-commit

@@ -1,17 +1 @@
-#!/bin/sh
-if npm list prettier | grep -q prettier@ ; then
-    echo husky - prettier is installed
-else
-    echo husky - prettier is not installed, skipping format check
-    exit 0
-fi
-
-# run prettier on all .ts files that are in the commit
-changed=$(git diff --diff-filter=ACM --cached --name-only | grep .ts$ | tr '\n' ' ')
-
-if [ -z "$changed" ]; then
-    echo husky - No modified files to check
-    exit 0
-fi
-
-npx prettier $changed --check
+npm exec lint-staged

.husky/pre-push

@@ -0,0 +1,5 @@
+branch_name="$(git symbolic-ref --short HEAD)"
+if [ "$branch_name" = "main" ]; then
+  echo "Pushing directly to main is not allowed."
+  exit 1
+fi