Main changes:
- Neutral License schema and collateral files.
- S2-LP Component Driver now includes the official S2-LP Library from S2-LP DK.
- Added Custom Board support.
- Added support for multiple S2-LP GPIOs.
- Added FIFO TX/RX examples for Custom Board.
- Added CLI example to configure the radio via S2-LP DK GUI.
- Moved common functions to new s2lp_management.c/h files.