Osu: Carets in text input should blink to currently playing music

[recapitalverb]

Describe the new feature: I think the title is self-explanatory - the cursor (seen in the image below) should blink to the beat of the currently playing song.

[GSculerlor]

Afaik caret loop duration is hardcoded on framework side (See https://github.com/ppy/osu-framework/blob/master/osu.Framework/Graphics/UserInterface/TextBox.cs#L380)

[bdach]

Doing this might not look great with high BPM tracks. Would need to try and see.

[HoLLy-HaCKeR]

Doing this might not look great with high BPM tracks. Would need to try and see.

Could be scaled down similar to how CtB bananas are handled: keep dividing by 2 until you get to a reasonable number

[MightyHelper]

I'm not sure how this would look so I'll suggest it:
If the current playing song is in a Kiai section, then make the text jump in time with the music. ( could be in time with the caret.)
By jump I mean, increase the thickness ( kinda like bold but not half as much )
I suggest making it togglable if it gets too annoying on any specific map/song.

[bdach]

Personally I'm quite opposed to messing with the text thickness, I'm 99% sure it'll be too distracting.

[KaiHicks]

Doing this might not look great with high BPM tracks. Would need to try and see.

Could be scaled down similar to how CtB bananas are handled: keep dividing by 2 until you get to a reasonable number

What about maps with a high prime BPM? In those cases, it would probably be best to just revert to the standard blink-rate.

[InvisibleSymbol]

I think you all are overthinking this, as there already is an implementation of this behaviour in lazer, see https://github.com/ppy/osu/blob/master/osu.Game.Tests/Visual/UserInterface/TestSceneBeatSyncedContainer.cs. Pretty sure this can also be applied here.