Best practices godot interfaces

[thiagola92]

Update one code block in Godot Interfaces

[thiagola92]

Updated setter from

@export var const_script: Script:
    set = set_const_script
func set_const_script(value):
    if Engine.is_editor_hint():
        const_script = value

to

@export var const_script: Script:
    set(value):
        if Engine.is_editor_hint():
            const_script = value

[Piralein]

This PR was unfortunately superseded by #7640.

I'm sorry we missed the duplicate. Thank you for your contribution nonetheless.