Update: Scene tree inspector

[Mathijs-Bakker]

• All available nodes (as in Godot 4.6) are available in the inspector.
• All node icons have Godot like categorized colors.
• Removes: bottom from the layout config.
• Adds: 'left' as the default position of the scene tree inspector pane
• Adds: Key map hints (eg. for yanking a node path).
• Adds: screenshot with: Godot's 'console' runner output and 'scene tree inspector'
• Updates: Docs and README.md