Extensible handlers for entities

[uecasm]

Closes discord request Closes discord request

Changes proposed in this pull request

• Moves the "Remove Filtered" button below the resource list to hopefully reduce misclicks.
• Fixes some off-by-one errors when converting bounding boxes to AABBs (particularly for entity searches).
• Adds "entity handlers", which similar to placement handlers are extensible by addon mods to hook into UI and placement behaviour, instead of relying on hard-coded checks.
  • As before, only certain entities will place in survival mode (assuming Minecolonies or another survival handler is installed).
  • Entities without any handler are not placeable in survival (but can still be placed in creative). When a handler is defined then the entity becomes placeable by default, unless the handler says otherwise.
  • Glow item frames now require themselves as resources, instead of being a free upgrade from normal item frames.
• The scan tool entity list now shows some extra icons:
  • Up to four item icons showing the resource types that will be required in survival mode.
  • A red/green indicator showing whether this entity can be placed in survival mode. (This is somewhat irrelevant to Structurize alone but useful if there's any survival mod on top.)

Testing

• [x] Yes I tested this before submitting it.
• [ ] I also did a multiplayer test.

Review please (should port)

[uecasm]

testing

You can see most of the test blueprints I was using in the description screenshot. Mostly paintings and item frames, but I tried several other things too. Pictured here is your blueprint rotated twice, placed, and scan-boxed again, it looks ok AFAICT.

[Nightenom]

I've DMed you @uecasm, I'm generally fine with changes but I would like to test it myself on 1.21, so either you or I need to port this branch first, tell me whatever works best for you