Allow jumping directly to a Godot function call's documentation

[Naros]

Description

For example, given the following Call function, which calls start() on a Timer:

The context menu has a View Documentation option, it would be more useful if either Orchestrator was able to render information about the function, its signature, and description. If that isn't possible due to GDExtension limitations, would it be at least possible to refer the user to the actual function documentation as there should be sufficient context to redirect there, i.e.:

Implementation ideas

No response

[Naros]

So Godot 4.3 has broken how we interfaced with documentation, with no replacement. Looking at whether we should consider implementing the UI as a ScriptEditorBase implementation from the engine's source, this is also not possible because GDE does not expose a way for contributors to register custom editors. 😞

So this may be a bit before we can get to it as we'll need to open a feature request to the editor.

[Naros]

Looking at the Godot editor source, we have a couple of options:

1. Request that EditorInterface expose a goto_help(String&) method that accepts a full topic descriptor.
2. Request that ScriptEditor expose its goto_help method that takes a full topic descriptor.

I think both of these would solve our issue, the main question is whether this can get into Godot 4.3.

[Naros]

Created upstream PR - godotengine/godot#90189