Refactors the holodeck to use map templates instead of copy_contents_to, which every maintainer seems to have complaints about.
Fixes#41485 because the matches become part of the spawned list created by ssatoms
Fixes#54789 because the holodeck area no longer has the NO_TELEPORT flag
Fixes#55676 because the map templates cant be changed midround unlike the program copies in the centcom z level
Fixes#49318 because the holodeck no longer creates new areas like the original did
This pr also changes initTemplateBounds to be a /datum/map_template proc instead of a parsed_map proc. This was mainly so I wouldn't have to duplicate vars between map_template and parsed_map. It's also nice because there's no longer a parsed_map proc inside the map_template file, especially when it didn't need to be a parsed_map proc.
The holodeck sims wont take up space in the centcom z level any more (which allows for more possible programs in the future), and map templates are more heavily tested. This is also a chance to future proof the holodeck against bugs. Holodeck also seems more responsive. This should allow for a second custom holodeck in some future ruin as well, although that of course will not be in play for the near future because of the offstation content ban. Also I documented the fuck out of the holodeck
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