- implemented complete resolving of constants - both global and class-local.

This uses a different algorithm as the old implementation - instead of recursively resolving unknown symbols it will first collect all constants from all scopes and then process them in one operation, doing multiple passes over the list until no more constants can be resolved anymore.

src/zscript/zcc_parser.cpp

@@ -338,7 +338,8 @@ static void DoParse(int lumpnum)
 #endif
 	}
 
-	PSymbolTable symtable(&GlobalSymbols);
+	PSymbolTable symtable;
+	symtable.SetName("Global_Node");
 	ZCCCompiler cc(state, NULL, symtable, GlobalSymbols);
 	cc.Compile();
 	// ... and another one afterward so we can see what the compiler does with the data.