feat(spaces): hierarchy over federation

Majorly refactors how space hierarchy was done before, ripping out the main components into separate functions.

Closes #410 #394

Partially addresses #374

Left to do:

• Properly sort children
  • Out of scope, wasn't properly sorted before this merge request, and is more effort than I originally thought. It seems this is keeping #374 from being fully fixed
• Write tests

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• I agree to release my code and all other changes of this MR under the Apache-2.0 license