[Feature] Search in WorldInspectorPlugin

[bbb651]

I think it would be really useful to have searching by default in the WorldInspectorPlugin plugin.

I've made a small demonstration of how it could work (it currently only searches for things in the top level and lacks fuzzy matching)

Kooha-2024-01-20-17-45-00.webm

Searching something nested in the tree should probably display all it's ancestors and highlight it, like blender does

Kooha-2024-01-20-17-49-31.webm

Another thing that I think blender's inspector does well is showing objects (the orange upsidedown triangles, roughly analogous to entities) in the same depths as the rest of the data (roughly analogous to components). Having Children double up the indentation of all entity relations hurts usability, I think having icons to represent entities and just showing the children directly instead or in addition to the Children component would be really nice to have.