Update Doxyfile for PROGMEM inclusion

Author: brentru

Doxyfile

@@ -2034,7 +2034,7 @@ ENABLE_PREPROCESSING   = YES
 # The default value is: NO.
 # This tag requires that the tag ENABLE_PREPROCESSING is set to YES.
 
-MACRO_EXPANSION        = NO
+MACRO_EXPANSION        = YES
 
 # If the EXPAND_ONLY_PREDEF and MACRO_EXPANSION tags are both set to YES then
 # the macro expansion is limited to the macros specified with the PREDEFINED and
@@ -2074,7 +2074,7 @@ INCLUDE_FILE_PATTERNS  =
 # recursively expanded use the := operator instead of the = operator.
 # This tag requires that the tag ENABLE_PREPROCESSING is set to YES.
 
-PREDEFINED             = __cdecl=, ARDUINO_ARCH_ESP32=1, ARDUINO_FUNHOUSE_ESP32S2=1
+PREDEFINED             = __cdecl=, ARDUINO_ARCH_ESP32=1, ARDUINO_FUNHOUSE_ESP32S2=1, PROGMEM=
 
 # If the MACRO_EXPANSION and EXPAND_ONLY_PREDEF tags are set to YES then this
 # tag can be used to specify a list of macro names that should be expanded. The