Add basic sanity test github PR workflow #1

Job	Run time
build (Heltec_v3_repeater)	2m 47s
build (RAK_4631_companion_radio_ble)	2m 19s
build (wio-e5-mini_repeater)	2m 3s
build (RAK_4631_repeater)	2m 14s
build (PicoW_repeater)	2m 28s
build (LilyGo_Tlora_C6_repeater_)	2m 1s
build (Heltec_v3_companion_radio_ble)	3m 0s
build (RAK_4631_room_server)	2m 22s
build (Heltec_v3_room_server)	2m 46s
	22m 0s

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