Official release v5.0.0

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.