Add MeshCore relay_radio firmware for Heltec T114

docs/terminal_chat_cli.md

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+# Terminal Chat CLI
+
+Below are the commands you can enter into the Terminal Chat clients:
+
+```
+set freq {frequency}
+```
+Set the LoRa frequency. Example:  set freq 915.8
+
+```
+set tx {tx-power-dbm}
+```
+Sets LoRa transmit power in dBm.
+
+```
+set name {name}
+```
+Sets your advertisement name.
+
+```
+set lat {latitude}
+```
+Sets your advertisement map latitude. (decimal degrees)
+
+```
+set lon {longitude}
+```
+Sets your advertisement map longitude. (decimal degrees)
+
+```
+set dutycycle {percent}
+```
+Sets the transmit duty cycle limit (1-100%). Example: `set dutycycle 10` for 10%.
+
+```
+set af {air-time-factor}
+```
+Sets the transmit air-time-factor. Deprecated — use `set dutycycle` instead.
+
+
+```
+time {epoch-secs}
+```
+Set the device clock using UNIX epoch seconds. Example:  time 1738242833
+
+
+```
+advert
+```
+Sends an advertisement packet
+
+```
+clock
+```
+Displays current time per device's clock.
+
+
+```
+ver
+```
+Shows the device version and firmware build date.
+
+```
+card
+```
+Displays *your* 'business card', for others to manually _import_
+
+```
+import {card}
+```
+Imports the given card to your contacts.
+
+```
+list {n}
+```
+List all contacts by most recent. (optional {n}, is the last n by advertisement date)
+
+```
+to
+```
+Shows the name of current recipient contact. (for subsequent 'send' commands)
+
+```
+to {name-prefix}
+```
+Sets the recipient to the _first_ matching contact (in 'list') by the name prefix. (ie. you don't have to type whole name)
+
+```
+send {text}
+```
+Sends the text message (as DM) to current recipient.
+
+```
+reset path
+```
+Resets the path to current recipient, for new path discovery.
+
+```
+public {text}
+```
+Sends the text message to the built-in 'public' group channel