Zigbee add-on v0.2.0

This is an experimental release.

• Added:
  • The NCP sample.
  • The ZBOSS NCP Host package v3.0.0.
• Updated the documentation with small improvements.

Zigbee add-on v0.1.0

• Experimental support for the ZBOSS R23 stack for the nRF54L15 SoC. Released Zigbee library is not certified.
• Basic samples:
  • Light bulb
  • Light switch
  • Network coordinator
  • Shell
  • Template