ESP32: Initial sort variants by platform (#7340)

variants/esp32/m5stack_coreink/platformio.ini

@@ -0,0 +1,28 @@
+[env:m5stack-coreink]
+extends = esp32_base
+board = m5stack-coreink
+board_check = true
+build_src_filter = 
+  ${esp32_base.build_src_filter}
+build_flags = 
+  ${esp32_base.build_flags}
+  -I variants/esp32/m5stack_coreink
+  ;-D RADIOLIB_VERBOSE
+  -Ofast
+  -D__MCUXPRESSO
+  -DEINK_DISPLAY_MODEL=GxEPD2_154_M09
+  -DEINK_WIDTH=200
+  -DEINK_HEIGHT=200
+  -DUSER_SETUP_LOADED
+  -DM5_COREINK 
+  -DM5STACK
+lib_deps = 
+  ${esp32_base.lib_deps}
+  zinggjm/GxEPD2@^1.6.2
+  lewisxhe/PCF8563_Library@^1.0.1
+lib_ignore =
+  m5stack-coreink
+monitor_filters = esp32_exception_decoder
+board_build.f_cpu = 240000000L
+upload_protocol = esptool
+upload_port = /dev/ttyACM0