allow tape looping behavior to be changed

[catfact]

this behavior is actually controlled by a runtime flag called loopFile within the Tape module, but it does not have public setters. i believe adding setter and corresponding OSC handler would be sufficient to toggle looping.

https://github.com/monome/norns/blob/main/crone/src/Tape.h#L346

might be good to expose this to OSC / lua.

[tehn]

this would be good.

it doesn't seem like there's a good place in the PARAMETER menu that makes sense to control this (short of adding a new SUB for tape, which this would be the only option).

alternatively, i propose a minor rework of the TAPE UI:

• E2 (scroll) switches between PLAY and REC (which follows existing UI for up/down)
• K2 cancels an armed PLAY or REC (currently there's no way to cancel, and this would also follow existing conventions.) presently this toggles between PLAY and REC (i don't know why i made this decision)
• E3 in PLAY toggles loop mode

if this seems like a good idea, i can work on this next week

[dndrks]

combing through old tickets surfaced: #766
@tehn , re: K2 -- could 'canceling' an in-progress PLAY inherit the current STOP functionality, leaving K3 free for PAUSE?

[tehn]

the UI opportunity is clear, but the tape module presently doesn't have a PAUSE state so that's an additional feature