WIP:Add pre/post loadable modules for external programs, consolidate launching door features

Add loadable modules for pre/post external program execution. This will allow all shells/web/etc. to present all features of loading a door (ANSI file, pause, clear, fonts, etc.)

ctrl/text.dat

@@ -1023,4 +1023,5 @@
 "\xdc\xdd\xdf\xde"                                        841 SpinningCursor8
 "\xfa\xf9\xfe\xf9"                                        842 SpinningCursor9
 "\1_\1b\1h[\1c@CHECKMARK@\1b] \1yTerminal columns "\      843 HowManyColumns
-	"[\1wAuto\1y]: \1n"
\ No newline at end of file
+	"[\1wAuto\1y]: \1n"
+"\r\nExternal program not found\r\n"           844 NoXtrnProgram