Merge pull request #27 from f4rk4sh/farkash

fixing bugs: navigation to the past in timetable by customer and master; making day off by master when this day already has upcoming visits; navigate to previous week first day bug; namespace in customer commands and master timetabel; etc

Merge pull request #26 from f4rk4sh/farkash

refractoring code, optimizing imports, adding minor fixes

refractoring code: all messages are storing now in one file

Merge pull request #25 from f4rk4sh/farkash

switching from gino orm + alembic to tortoise orm + aerich, initializing migrations; fixing browsing to the past bug; reformating project code via black, isort

Merge pull request #24 from f4rk4sh/farkash

adding presentation, db diagram, use cases

Merge pull request #23 from f4rk4sh/farkash

updating master deletion to master firing, final fixes

Merge pull request #22 from f4rk4sh/yahudin

Merge branch 'main' into yahudin

Final updates

Merge pull request #21 from f4rk4sh/farkash