minewsemi: refactor platformio.ini #976

Job	Run time
build (RAK_4631_repeater)	2m 40s
build (LilyGo_Tlora_C6_repeater_)	2m 26s
build (RAK_4631_companion_radio_ble)	2m 30s
build (Heltec_v3_room_server)	3m 16s
build (Heltec_v3_repeater)	2m 51s
build (Heltec_v3_companion_radio_ble)	3m 5s
build (PicoW_repeater)	2m 45s
build (wio_wm1110_repeater)	2m 19s
build (wio-e5-mini_repeater)	1m 57s
build (Tbeam_SX1276_repeater)	2m 1s
build (RAK_4631_room_server)	2m 30s
	28m 20s

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