Add Device Motion module

[nkymut]

This change adds 'motion' package, which introduces smartphone's acceleration, gravity, rotation, and orientation signals for dynamic pattern creation in Strudel.

example:

enableMotion() //enable DeviceMotion 

let tempo = 200

$_: accX.segment(16).gain().log()

$:n("[0 1 3 1 5 4]/4")
  .scale("Bb:lydian")
  .sometimesBy(0.5,sub(note(12)))
  .lpf(gravityY.range(20,1000))
  .lpq(gravityZ.range(1,30))
  .lpenv(gravityX.range(2,2))
  .gain(oriX.range(0.2,0.8))
  .room(oriZ.range(0,0.5))
  .attack(oriY.range(0,0.3))
  .delay(rotG.range(0,1))
  .decay(rotA.range(0,1))
  .attack(rotB.range(0,0.1))
  .sound("sawtooth").cpm(tempo)

as discussed in
https://discord.com/channels/779427371270275082/1308356687538683958/1308731644097728514

Tested only on the iPhone 13 Pro; testing on Android devices is still required.

[felixroos]

sorry for not looking at this for so long.. thank you for the PR ! the code looks good, tho it seems the PR is now mixed with #1223 ?
i can test this on android as well..
it might also be useful to have a little guide in the docs so people can discover this feature

[nkymut]

Oops, I didn’t realise I had mixed this up with other updates I was testing.
I’ll try to roll back the commits where I published the PR and am also looking into the guide for the module.