workspacer 0.9.11.2

Feat/focus layout (#276)

* feat : add Focus Layout

* feat: organized focus layout to open new windows on the bottom right

* removed comment typo

* chore: refactor to extract some calculation from CalcLayout

* fix: bug when more than one primary, added unit tests, main area fill screen when no secondary

Co-authored-by: Benoit Lalande <blalande@d-edge.com>
Co-authored-by: Jostein Kjønigsen <jostein@kjonigsen.net>