[nanoleaf] Refactored code to use core features and more (#10101)

[nanoleaf] Refactored code to use core features and more (#10101)

This is a bigger refactoring bringing these (breaking) changes:
- System channel types are used where applicable
- Obsolete channels (such as power) were removed
- Some channel types were marked "advanced"
- "Tap" channels were converted to a trigger channel type providing a "system button" behavior
- Layout can now be requested by a console command
- Command options for effect channel are dynamically provided
- Log level has been reduced where appropriate
- HTTP request timeouts were reduced
- handleRemoval now returns quickly as expected
- Fixed hanging thread / infinite loop when requesting layouts for non-square panels
- Various other smaller enhancements and fixes
- Documentation has been adapted accordingly

Signed-off-by: Kai Kreuzer <kai@openhab.org>