Nectere dimension retro-generation configuration

[Kneelawk]

Currently, in order to add the Nectere dimension to an existing world, the world must be on a dedicated server, and the user must place a file named 'force-hotm' in the same directory as the server's server.jar file. This means that adding the Nectere dimension to existing single-player worlds is currently impossible. This form of retro-generation flag is also just rather clunky as some minecraft server hosts don't give the user access to their server directory.

There needs to be a better way to configure this functionality. Some better ways for retroactively generating the Nectere dimension could be:

• On a dedicated server, also search for a flag file (likely named 'force-hotm') in the server's config directory. Most modded minecraft server providers are likely to allow the user to access the server's config directory because it can be quite important to change server-side config values.
• On a single-player world, maybe look for a flag file (likely named 'force-hotm') in the world's base directory when loading the world. This means that the flag-file can be world-specific in single-player circumstances.
• Possibly add a command for retroactively adding the Nectere dimension to the current world?

[Kneelawk]

Alternate suggestion: automatically generate the Nectere dimension on any world that is missing it as soon as a Nectere Portal is entered.