Code editor: Area designer: Add import room/object/monster

[icewolfz]

Add an option to import a code file into the designer

monsters would be imported into the monster list and as much code would be parsed and saved when possible
objects same as monsters
rooms would be imported over current focused/selected room or by context menu on room

this requires a code parser, there is a basic one in the virtual area editor but it only parses the create function enough to create a basic room preview, the lpc module has tokenizers and such that may be used to read in a file and attempt to parse into usable data possibly its not a fulle antlr or similar code parser, might beable to find a node antlr module and use lpc antlr file from https://github.com/lasorda/antlr-lpc/tree/master