Add Verification Manual VM6 (#756)

* VM6 First Commit

* VM6 Second Penultimate Commit

* VM6 Third Penultimate Commit

* VM6 Fourth Penultimate Commit

* VM6 Fifth Penultimate Commit

* VM6 Sixth Penultimate Commit

* VM6 Seventh Penultimate Commit

* VM6 Eighth Commit is the last commit with all updates4

* checked greek letters, changed the way of fucntion calling and printing of outputs

* pyvista == 0.32.1 added to req_doc and req_test to avoid build_doc issue

* pyvista == 0.32.1 removed from req_test

* Update requirements_docs.txt

Co-authored-by: Alex Kaszynski <[email protected]>

Author: RomanIlchenko1308