DifficultyCalculator
IRulesetInfo
IWorkingBeatmap
Out of the scope of this PR
Add "placeholder" (pre-MVP) implementation of osu!catch editor
LegacySkinTransformer
ISkin
ISkinSource
Currently empty, automatically handled in game to not be selectable (see `Mod.HasImplementation`)
# Conflicts: # osu.Game.Rulesets.Catch/CatchRuleset.cs # osu.Game.Rulesets.Mania/ManiaRuleset.cs # osu.Game.Rulesets.Taiko/TaikoRuleset.cs
Move CreateScoreProcessor() to Ruleset