Various improvements to scripting lang

- Errors will now be more precise, there are now 2 separate errors for a function lookup failure and a failure inside a function
- Errors will now show which line number they failed at, instead of the character offset
- Minus values are not considered errors anymore, however, printing them does not work well
- Gotos now make a @RETURN variable to make making functions easier

source/tegraexplorer/script/parser.h

@@ -1,5 +1,7 @@
 #pragma once
 
+#define INFUNC_FAIL (int)0xC0000000
+
 void runScript(char *path);
 void skipbrackets();
 void getfollowingchar(char end);