ESP32: Initial sort variants by platform (#7340)

variants/esp32/m5stack_core/platformio.ini

@@ -0,0 +1,29 @@
+[env:m5stack-core]
+extends = esp32_base
+board = m5stack-core-esp32
+monitor_filters = esp32_exception_decoder
+build_src_filter = 
+  ${esp32_base.build_src_filter}
+build_flags = 
+  ${esp32_base.build_flags}
+  -I variants/esp32/m5stack_core
+  -DILI9341_DRIVER
+  -DM5STACK
+  -DUSER_SETUP_LOADED
+  -DTFT_SDA_READ
+  -DTFT_DRIVER=0x9341
+  -DTFT_MISO=19
+  -DTFT_MOSI=23
+  -DTFT_SCLK=18
+  -DTFT_CS=14
+  -DTFT_DC=27
+  -DTFT_RST=33
+  -DTFT_BL=32
+  -DSPI_FREQUENCY=40000000
+  -DSPI_READ_FREQUENCY=16000000
+  -DDISABLE_ALL_LIBRARY_WARNINGS
+lib_ignore =
+  m5stack-core
+lib_deps = 
+  ${esp32_base.lib_deps}
+  lovyan03/LovyanGFX@^1.2.0