Optimize chair-adjustment (leg and back rest)

[Jonny999999]

ideas and todo's for improving the chair adjustment are collected here. Also see noted todo's in chairAdjust.cpp

ideas, todo

• [x] add separate task that controls chair adjustment
  • [x] timeout
  • [x] track position
  • [x] re-calibrate automatically ( detect situation when probably at limit )
  • [x] auto-adjust: move to position while driving
  • [ ] control via app
• [x] add delay between direction change (to prevent abuse)

[Jonny999999]

Added all ideas except the app in the following merge: 6a2efb443293ae4d40704f80b031ac4274f341fa