added basic contrib guidelines into readme

README.md

@@ -31,6 +31,6 @@ python -m pip install git+https://gitlab.dkrz.de/nils/coyote.git
 
 ## Contributing
 
-* Ensure the use of .clang-format and ruff configurations provided in your dev-env
+* Ensure the use of .clang-format and ruff configurations provided in your dev-env. The pre-commit-config would ensure that the clang-format and ruff points out to the warnings from its static code analysis before the commit gets staged. Do not over-ride it but aim to fix it. 
 * Try to write atleast 1 test per feature developed
 * Ensure that the MR and Issues are created using appropriate templates
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