v0.0.18

[Task] Update secrets docs with submodule mkdocs SA 5304 (#27)

* Updated secrets docs with git submodule mkdocs theme common

* Removed tracking for mkdocs yml root file as it is originated at the run time

* Updated github workflows and prepare theme shell script and gitignore

* Replaced dead links with the working one

* Shifted footer logos to theme common

* Updated the theme override

* Updated theme common

* Updated theme common