Add pre-commit hooks

.pre-commit-config.yaml

@@ -0,0 +1,13 @@
+repos:
+-   repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v3.4.0
+    hooks:
+    -   id: check-merge-conflict
+    -   id: end-of-file-fixer
+    -   id: mixed-line-ending
+    -   id: trailing-whitespace
+-   repo: https://github.com/doublify/pre-commit-rust
+    rev: master
+    hooks:
+    -   id: fmt
+    -   id: clippy