ci: prevent file with merge conflicts

Author: Allen-1998

.husky/pre-commit

@@ -1,4 +1,14 @@
 #!/bin/sh
+if git rev-parse --verify HEAD >/dev/null 2>&1
+then
+	against=HEAD
+else
+	# Initial commit: diff against an empty tree object
+	against=$(git hash-object -t tree /dev/null)
+fi
+
+exec git diff-index --check --cached $against --
+
 . "$(dirname "$0")/_/husky.sh"
 
 npx lint-staged