- create useCompletion hook to fetch completions with debouncing and abort control
- Updated `PromptsTab.tsx` and `ResourcesTab.tsx` to utilize the `Combobox` component and `useCompletions` hook, enabling argument autocompletion for prompts and resource URIs as per the MCP specification.
- Added a combobox to show completions
Add a button to the ListPane component that clears loaded items. This
will allow the user to clear and reload resources, resource templates,
prompts or tools when they expect the available items to have changed.
