Dynmap tile support

[alicerunsonfedora]

Some Minecraft servers might have the Dynmap plugin installed to generate map tiles that are compatible with Google Maps, MapKit, etc. These map tiles can display more than just the raw biomes, and it might be beneficial to the player.

MKTileOverlay overlays do support loading in from a template URL, but some parts will need to be worked out. Notably:

• CubiomesKit will need an update to support switching between a Dynmap service and the default, offline behavior. This will also require refactoring the logic slightly to accommodate, since the calculations might not be required.
• The manifest will likely need to hold the URL somewhere as a string value, so that it can be loaded in.
• If relevant, the privacy policy might need to be updated to reflect that Minecraft servers with Dynmap enabled might have different data collection policies from Alidade itself, and that map files might be subject to those privacy policies.