feat: Add button to clear loaded items

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.

client/src/components/PromptsTab.tsx

@@ -22,6 +22,7 @@ export type Prompt = {
 const PromptsTab = ({
   prompts,
   listPrompts,
+  clearPrompts,
   getPrompt,
   selectedPrompt,
   setSelectedPrompt,
@@ -31,6 +32,7 @@ const PromptsTab = ({
 }: {
   prompts: Prompt[];
   listPrompts: () => void;
+  clearPrompts: () => void;
   getPrompt: (name: string, args: Record<string, string>) => void;
   selectedPrompt: Prompt | null;
   setSelectedPrompt: (prompt: Prompt) => void;
@@ -55,6 +57,7 @@ const PromptsTab = ({
       <ListPane
         items={prompts}
         listItems={listPrompts}
+        clearItems={clearPrompts}
         setSelectedItem={(prompt) => {
           setSelectedPrompt(prompt);
           setPromptArgs({});