* variants + S3 GPIO48 * fixes unphone8.build.flash_type * fixes unphone8.build.flash_type * heltec board name issue step 1 * heltec board name issue step 2 * fixes defines and new boards * final review
* Added support for Cytron Maker Feather AIoT S3. * 1. Select OPI PSRAM by default. 2. Fixed pin name error in variant.cpp. 3. Added definition for RGB_BUILTIN. * Define the RGB_BUILTIN as shown in #6979. * Added pin definition for A12 (Vin Sense).