add precommit ci

README.md

@@ -1,7 +1,8 @@
 # DAVE
+[![pre-commit.ci status](https://results.pre-commit.ci/badge/github/IOES-Lab/dave/master.svg)](https://results.pre-commit.ci/latest/github/IOES-Lab/dave/master)
 
 All documentation of Project DAVE can be found in the [Dave Documentation (https://field-robotics-lab.github.io/dave.doc/)](https://field-robotics-lab.github.io/dave.doc/).
 
 The documentation source code is in the [Field-Robotics-Lab/dave.doc](https://github.com/Field-Robotics-Lab/dave.doc) repository.
 
-For contribution, do `pre-commit install` before commit.
+For contribution, do `pip3 install pre-commit && pre-commit install && pre-commit run --all-files` before commit.