🔨 Update schema ignores, export value

Marlin/Configuration_adv.h

  *  3 = schema.json - The entire configuration schema. (13 = pattern groups)
  *  4 = schema.yml - The entire configuration schema.
  */
-//#define CONFIG_EXPORT   // :[1:'JSON', 2:'config.ini', 3:'schema.json', 4:'schema.yml']
+//#define CONFIG_EXPORT 2 // :[1:'JSON', 2:'config.ini', 3:'schema.json', 4:'schema.yml']
 
 //===========================================================================
 //============================= Thermal Settings ============================

buildroot/share/PlatformIO/scripts/schema.py

 	# Regex for #define NAME [VALUE] [COMMENT] with sanitized line
 	defgrep = re.compile(r'^(//)?\s*(#define)\s+([A-Za-z0-9_]+)\s*(.*?)\s*(//.+)?$')
 	# Defines to ignore
-	ignore = ('CONFIGURATION_H_VERSION', 'CONFIGURATION_ADV_H_VERSION', 'CONFIG_EXPORT')
+	ignore = ('CONFIGURATION_H_VERSION', 'CONFIGURATION_ADV_H_VERSION', 'CONFIG_EXAMPLES_DIR', 'CONFIG_EXPORT')
 	# Start with unknown state
 	state = Parse.NORMAL
 	# Serial ID