Rename README.md to GH_workflows_readme.md (#698)

* Rename README.md to GH_workflows_readme.md

this readme was  overriding the default readme view in root repository 

see here https://github.com/forrtproject/forrtproject.github.io/

* moved to workflows

* Rename GH_workflows_readme.md to README.md

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Co-authored-by: Lukas Wallrich <lukas.wallrich@gmail.com>

Author: richarddushime