Skip scripts during 'platformio init' (#21643)

buildroot/share/PlatformIO/scripts/common-cxxflags.py

@@ -3,6 +3,12 @@
 # Convenience script to apply customizations to CPP flags
 #
 Import("env")
+
+# Detect that 'vscode init' is running
+from SCons.Script import COMMAND_LINE_TARGETS
+if "idedata" in COMMAND_LINE_TARGETS:
+    env.Exit(0)
+
 env.Append(CXXFLAGS=[
   "-Wno-register"
   #"-Wno-incompatible-pointer-types",