Feature: implement outline support

[ArnCarveris]

Is your feature request related to a problem? Please describe.
UnityAssetViewer takes long time to open and impossible to navigate hierarchy that select text location

Describe the solution you'd like
Implement caching for outline, it should include all possible types not only GameObject like UnityAssetViewer have

Describe alternatives you've considered
It should be fast and persistent and should work when yaml is corrupted by merge conflict

Additional context
Any big real project

[dunward]

When yaml is corrupted, it's impossible to show up in AssetViewer.
But maybe caching data is exist, that can be show up when the file is corrupted.
I'll investigated.

[ArnCarveris]

Well you should allow for yaml to parse merge conflict headers and make specific nodes for then, or just skip whole yaml stuff and parse via regex or other stuff what is needed.

[dunward]

Status Update
I apologize for the delay to being busy with company-related tasks recently. I will apply the changes when I am able to.