Function toggle_annotation_resolution 

pub fn toggle_annotation_resolution(
    document: &Document,
    position: Position,
    resolved: bool,
) -> Option<AnnotationEdit>

Toggles the resolution status of the annotation at the given position.

When resolved is true, adds or updates status=resolved in the annotation header. When resolved is false, removes the status parameter if present.

Returns None if:

• No annotation exists at the position
• The annotation already has the requested status (no change needed)

The returned AnnotationEdit contains the header range and new text, which the editor should apply as a text replacement.