Add pre-commit hooks (#59)

Author: keith

.pre-commit-config.yaml

@@ -0,0 +1,11 @@
+repos:
+  - repo: https://github.com/keith/pre-commit-buildifier
+    rev: 8.2.1
+    hooks:
+      - id: buildifier
+      - id: buildifier-lint
+
+  - repo: https://github.com/pre-commit/mirrors-clang-format
+    rev: v21.1.1
+    hooks:
+      - id: clang-format