Update 4.6.0

[AFSK] Added AFSK via OOK/AM example
[CC1101] Added 0x17 as valid version number (#349)
[CC1101] Fixed blocking receive always returning timeout (#348)
Added SerialModule wrapper class (#305)
[AX.25] Added option to adjust audio frequencies (#346)
[nRF24] Added interrupt-driven examples
[SX127x] Reworked errata fix (#372)
[RTTY] Remove call to standby after each byte (#306)
Added support for RP2040 (#361)
Added support for 4-FSK
[SX127x] Fixed direct mode inactive until first packet is received (#337)
[PHY] Added option to disable sync word matching (#337)
[AX25] Fixed extension bits and repeater callsigns
[Hell] Fixed comma bitmap (#384)
[SX127x] Only apply errata fix by a macro (#388)
[SX127x] Fixed missing call to FSK config in some derived classes (#395)
Added CubeCell support