Remove OS folder with structure for refman generation.
Remove tcl scripts from adm folder which used only for doc generation
Migrate all the processes of doc generation to cmake (adm/cmake/occt_doc.cmake)
RefMan and Overview build from CMake as a new utility option, no TCL is needed.
New repository for Inspector: https://github.com/Open-Cascade-SAS/Inspector
Documentation and all build process are fully migrated.
"tools" folder keep to share information for some time.
Keep building inspector as before to keep control of API changes via GitHub actions.
Add GitHub Action to build CSharp sample on Windows
Add MFC and Qt sample build actions
Improve CASROOT assignment logic in env.build.sh and env.install.sh for better compatibility with binary directories
Add GitHub Actions for TInspector build and clang-format check
Reorganize QT search to work with native Linux packages
Reorganize build-and-test workflow to have actions
Adding new step to retest result per each job line.
Rework logic to minimize retesting.
Creating base for splitting into actions.
Adding new TCL command to clear up test folder from skipped
