Feat/serial logger

[DaneEvans]

Add a few additional serial modes to allow logging of packets to uart.
Tested and consumed by an openlog on a RAK 4630 base.

=== Meshtastic Packet Log Mode (LOG) ===
Packet logs will be logged to UART
Time: 1 seconds since boot

[??:??:??] ID:0x522caf74 FROM:0xf21ce71e (e71e) TO:0xf21ce71e PORT:65
[??:??:??] ID:0x522caf75 FROM:0xf21ce71e (e71e) TO:0xf21ce71e PORT:6
[00:53:24] ID:0x7af731f9 FROM:0xf21ce71e (e71e) TO:0xf21ce71e ROUTING variant=3
[00:53:29] ID:0x9e554dfa FROM:0xf21ce71e (e71e) TO:BROADCAST NODEINFO short_name=e71e long_name=dev caves e71e
[00:53:44] ID:0x255219fb FROM:0xf21ce71e (e71e) TO:BROADCAST POSITION lat=-310940157 lon=1509332873 alt=380 sats=0
[00:54:40] ID:0x3a9a8c59 FROM:0x710c5ed7 (DEVA) TO:0xf21ce71e MSG:DM ina
[00:54:40] ID:0x3a0af1fe FROM:0xf21ce71e (e71e) TO:0x710c5ed7 ROUTING variant=3
[00:54:41] ID:0xd863a1ca FROM:0x710c5ed7 (DEVA) TO:0xf21ce71e ROUTING variant=3
[00:54:44] ID:0x3a9a8c5a FROM:0x710c5ed7 (DEVA) TO:0xf21ce71e MSG:DM in b
[00:54:44] ID:0xbdc8d9ff FROM:0xf21ce71e (e71e) TO:0x710c5ed7 ROUTING variant=3
[00:54:45] ID:0xa62035cb FROM:0x710c5ed7 (DEVA) TO:0xf21ce71e ROUTING variant=3
[00:54:52] ID:0x3a9a8c5b FROM:0x710c5ed7 (DEVA) TO:BROADCAST MSG:Bcst in a
[00:55:25] ID:0x522caf76 FROM:0xf21ce71e (e71e) TO:BROADCAST MSG:Bcst out
[00:55:27] ID:0xac4df601 FROM:0xf21ce71e (e71e) TO:0xf21ce71e ROUTING variant=3
[00:55:43] ID:0x522caf77 FROM:0xf21ce71e (e71e) TO:0x710c5ed7 MSG:DM out
[00:55:45] ID:0xfd4a69cf FROM:0x710c5ed7 (DEVA) TO:0xf21ce71e ROUTING variant=3
[00:55:45] ID:0x8d84be02 FROM:0xf21ce71e (e71e) TO:0x710c5ed7 ROUTING variant=3


=== Meshtastic Text-Only Log Mode (LOG_TEXT_ONLY) ===
Only text messages with metadata will be logged to UART
Format: [HH:MM:SS] FROM:0xXXXX (name) TO:BROADCAST/DM CH:channelname (index) MSG:message
Time: 5 seconds since boot

[??:??:??] ID:0x3a9a8c4c FROM:0x710c5ed7 (DEVA) TO:BROADCAST MSG:Out bct
[??:??:??] ID:0x3a9a8c4d FROM:0x710c5ed7 (DEVA) TO:BROADCAST MSG:In bct
[23:41:21] ID:0x522caf5f FROM:0xf21ce71e (e71e) TO:BROADCAST MSG:Out
[23:41:38] ID:0x522caf60 FROM:0xf21ce71e (e71e) TO:0x710c5ed7 MSG:DM out
[23:41:50] ID:0x3a9a8c4e FROM:0x710c5ed7 (DEVA) TO:0xf21ce71e MSG:DM in

🤝 Attestations
I have tested that my proposed changes behave as described.

I have tested that my proposed changes do not cause any obvious regressions on the following devices:
RAK WisBlock 4631 (custom w/ OpenLog. )

Requires:
Serial modes - Logging protobufs#841

Doco :
meshtastic/meshtastic#2187

Keeping as draft at the minute - it hasn't been linted and it's bedtime

[DaneEvans]

@thebentern Needs someone to add a label for me.
Otherwise it's looking good to me.