* refactored platformio.ini, breaking up into variants/*.ini files

variants/lilygo_tbeam/platformio.ini

@@ -0,0 +1,36 @@
+[LilyGo_TBeam]
+extends = esp32_base
+board = ttgo-t-beam
+build_flags =
+  ${esp32_base.build_flags}
+  -D LILYGO_TBEAM
+  -D RADIO_CLASS=CustomSX1276
+  -D WRAPPER_CLASS=CustomSX1276Wrapper
+  -D LORA_TX_POWER=20
+  -D P_LORA_TX_LED=4
+build_src_filter = ${esp32_base.build_src_filter}
+board_build.partitions = min_spiffs.csv ; get around 4mb flash limit
+
+[env:Tbeam_companion_radio_ble]
+extends = LilyGo_TBeam
+board_build.upload.maximum_ram_size=2000000
+build_flags =
+  ${LilyGo_TBeam.build_flags}
+  -D MAX_CONTACTS=100
+  -D MAX_GROUP_CHANNELS=1
+  -D BLE_PIN_CODE=123456
+  -D BLE_DEBUG_LOGGING=1
+  -D MESH_PACKET_LOGGING=1
+  -D MESH_DEBUG=1
+  -D RADIOLIB_DEBUG_BASIC=1
+;  -D ENABLE_PRIVATE_KEY_IMPORT=1
+;  -D ENABLE_PRIVATE_KEY_EXPORT=1
+;  -D MESH_PACKET_LOGGING=1
+;  -D MESH_DEBUG=1
+build_src_filter = ${LilyGo_TBeam.build_src_filter}
+  +<helpers/esp32/*.cpp>
+  +<../examples/companion_radio/main.cpp>
+lib_deps =
+  ${LilyGo_TBeam.lib_deps}
+  densaugeo/base64 @ ~1.4.0
+  lewisxhe/XPowersLib@^0.2.7