feat: View Hierarchy

[limbonaut]

This PR implements automatic capturing of scene tree hierarchy data. In Sentry, this feature is more commonly known as View Hierarchy. It's an opt-in feature that can be enabled by setting the attach_scene_tree option to true.

Implements #113
Resolves #166

Waiting for the product changes:

• Add improvements for Godot View Hierarchy sentry#88788

Depends on:

• feat: add option to attach view hierarchy sentry-native#1191

Documentation PR:

• feat(godot): Enriching events with scene tree data sentry-docs#13531

Remaining tasks:

• Add docs

[github-actions]

	Messages
📖	Do not forget to update Sentry-docs with your feature once the pull request gets approved.

Generated by 🚫 dangerJS against 849c540

[bruno-garcia]

See:

• feat(issue-details): Introduce godot changes to view hierarchy sentry#90146

[bruno-garcia]

@limbonaut this is unblocked now! exciting! :)

[limbonaut]

I've added a screenshot of view hierarchy as displayed on sentry.io. It works for both errors and crash reports. All we're missing is documentation changes.

[limbonaut]

Documentation added in:

• feat(godot): Enriching events with scene tree data sentry-docs#13531

Also, ensuring that capturing is only performed on the main thread plus small fixes.