[Request] Improve Location tasks to be more flexible

[noobanidus]

As it stands, specifying the direct X, Y, Z co-ordinates, for the most part, make the location task rather useless in worlds in general unless they are using a specific pre-made map.

Variants on this:

• Visiting a specific, specified biome.
• Visiting a biome that contains 1 or more specified types (HOT, SNOWY, etc)
• Visiting a specific Y location: going to the highest/lowest point available is already (partially) a quest with Thaumcraft, and it was requested specifically in #420.
• Visiting a specific structure: at least as far as I recall, structures store data about themselves in the chunk (i.e., as evidenced by the nether fortress advancement).
• Visiting another dimension.

Vague variants:

• Travel a certain distance away from spawn
• Travel a certain distance via boat
• Travel a certain distance via horse
• Travel a certain distance via a source of flight (elytra, hang glider, etc)

Of these, the two biome tasks have been implemented in another branch, but I need to merge them back into the main code base and test them more thoroughly.

[noobanidus]

Temporary work-around: using Triumph (without removing Vanilla advancements) allows you to create manual advancements that can provide triggers for most of the original requested modification.

As such, this won't be as high a priority moving forward as say, the break block/place block advancements.

[itsdinkd]

Going off what was sent to me from my own request, this pretty much sums up what I was requesting plus offers more I didn't think of. This would be a fantastic feature. This hits all the spots I cannot think of anything to add