update metafiles

CONTRIBUTING

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+# Contributing Guidelines
+
+Pull requests from everyone are welcome
+
+Procedure for contributing:
+
+- Create a fork of the repository on github  
+  In a top right corner of a GitHub, select "Fork"
+  Its recommended to fork latest version from main branch to avoid any possible conflicting code updates
+- Clone your forked repository to your local system  
+  `git clone https://github.com/<your-username>/<your-fork>
+- Make your changes  
+- Test your changes
+- Test your changes against code guidelines  
+  - `ruff check`
+  - `pylint <folder>/<filename>.py`
+- Push changes to your fork  
+- Submit a PR (pull request)
+
+Your pull request will be reviewed and pending review results, merged into main branch