add C2 skeleton to espidf builder

for building C2 as an component of IDF

Author: Jason2866

builder/frameworks/espidf.py

@@ -155,10 +155,14 @@ def _get_installed_standard_pip_packages():
 ):
     print("Warning! Debugging an IDF project requires PlatformIO Core >= 6.1.11!")
 
-# Arduino framework as a component is not compatible with ESP-IDF >5.3
 if "arduino" in env.subst("$PIOFRAMEWORK"):
     ARDUINO_FRAMEWORK_DIR = platform.get_package_dir("framework-arduinoespressif32")
     ARDUINO_FRMWRK_LIB_DIR = platform.get_package_dir("framework-arduinoespressif32-libs")
+    if mcu == "esp32c2":
+        ARDUINO_FRMWRK_C2_LIB_DIR = join(platform.get_package_dir("framework-arduinoespressif32-libs"),mcu)
+        if not os.path.exists(ARDUINO_FRMWRK_C2_LIB_DIR):
+            ARDUINO_C2_DIR = join(platform.get_package_dir("framework-arduino-c2-skeleton-lib"),mcu)
+            shutil.copytree(ARDUINO_C2_DIR, ARDUINO_FRMWRK_C2_LIB_DIR, dirs_exist_ok=True)
     # Possible package names in 'package@version' format is not compatible with CMake
     if "@" in os.path.basename(ARDUINO_FRAMEWORK_DIR):
         new_path = os.path.join(