Fix default schematic offsets

[dlsf]

Ran the /is home currentOffset command for all 9 schematics. The issue is that they all have different offsets, I used the one from the overworld schematic. However, we should probably implement offsets for all three dimensions.

Here is the list I compiled (second one is nether, third one is end), in case we need it for further changes:

Desert 1.5 88 -0.5 90
- 0.5 91 0.5 180
- 2.5 88 0.5 90
Jungle 0.5 82 4.5 180
- 0.5 89 0.5 0
- 0.5 90 0.5 180
Mushroom 1.5 89 -0.5 90
- 0.5 91 0.5 180
- 0.5 91 -3.5 0