New board: Elecrow CrowPanel Basic 2.8" (#225)

- Implemented Elecrow CrowPanel Basic 2.8"
- Change default "invert" setting for ILI934x driver from `true` to `false`
- Created `Xpt2046` driver subproject
- Refactored unPhone to use new `Xpt2046` driver subproject

CMakeLists.txt

@@ -37,6 +37,7 @@ if (DEFINED ENV{ESP_IDF_VERSION})
     # Non-ESP32 boards
     if(NOT "${IDF_TARGET}" STREQUAL "esp32")
         set(EXCLUDE_COMPONENTS "CYD-2432S024C")
+        set(EXCLUDE_COMPONENTS "ElecrowCrowpanelBasic28")
         set(EXCLUDE_COMPONENTS "M5stackCore2")
     endif()