Bugfixes, refractoring, tc calculation improvements, timeframes improvements

[anufrievroman]

Sorry, missed this PR somehow. Thank you for the huge work. I'll check this week.

[anufrievroman]

I'll be slowly checking and will write some ideas/feedback/plans here. So some non-critical things, but generally:

• Usually, the is_something or has_something objects are expected to return boolean. In our case, is_inside returns a string, which is not even used that much, or None, which might also be confusing. In the future, I'll try to standardize that part, so that is_inside returns True/False, while the place of scattering like right side is obtained with an additional little function is_right_side() or something like that.
• In the future, I'll also try to separate profiles and maps into different classes, as now it's a bit messy. Perhaps we could calculate all profiles from the maps at the end instead of wasting time on each step. ...

[phigas]

Please check https://anufrievroman.gitbook.io/freepaths/advanced-tutorials/adding-your-own-hole-or-pillar for an explanation of how the refractored holes work