Gabe Livengood

Adds a checkbox nub to the top right of all `OsuFileSelector`s and `OsuDirectorySelector`s that toggles the inclusion of hidden items. Closes #18573 For reference: ppy/osu-framework#5251

Refactor `DirectorySelector` to allow custom layouts

1

Necessary for the application of https://github.com/ppy/osu/pull/19048#discussion_r918566267. Also changes basic implementations to use `BasicCheckbox` instead of `BasicButton` so the toggle's current state is observable.

Add accuracy challenge mod

1

Previously discussed in #13120 and #18370. This mod adds a new failure condition to gameplay based on current accuracy. If accuracy goes below a set threshold (defaulting to 90% for...