* Calculate hit windows in performance calculator instead of databased difficulty attributes
* Apply mods to beatmap difficulty in osu! performance calculator
* Remove `GreatHitWindow` difficulty attribute for osu!mania
* Remove use of approach rate and overall difficulty attributes for osu!
* Remove use of hit window difficulty attributes in osu!taiko
* Remove use of approach rate attribute in osu!catch
* Remove unused attribute IDs
* Code quality
* Fix `computeDeviationUpperBound` being called before `greatHitWindow` is set
* Change slider drop penalty to use actual number of difficult sliders, fix slider nerf being too lenient
* Move cubing to performance calculation
* Add separate list for slider strains
* Rename difficulty atttribute
* Rename attribute in perfcalc
* Check if AimDifficultSliderCount is more than 0, code quality fixes
* Add `AimDifficultSliderCount` to the list of databased attributes
* Code quality
---------
Co-authored-by: James Wilson <tsunyoku@gmail.com>