internal-feat: create a new workflow and README.md for documentation

* internal-docs: add suffixes for internal commits in README.md

* internal-fix: correct CI script

* internal: make preferred branch CI variable

* internal: fix indentation in README.md

* internal: add stage for automatic change propagation to main

* internal: add new scripts

* internal: add default branch for submodule initialization

* internal: update readme for the new workflow