feat(client): Add PingTab when no server capabilities

The TypeScript SDK (and presumably others) quite possibly support at least pings out of the box so including the ping tab even if a server doesn't have capabilities seems to make sense.

client/src/App.tsx

@@ -575,11 +575,23 @@ const App = () => {
                 {!serverCapabilities?.resources &&
                 !serverCapabilities?.prompts &&
                 !serverCapabilities?.tools ? (
+                  <>
                     <div className="flex items-center justify-center p-4">
                       <p className="text-lg text-gray-500">
                         The connected server does not support any MCP capabilities
                       </p>
                     </div>
+                    <PingTab
+                      onPingClick={() => {
+                        void sendMCPRequest(
+                          {
+                            method: "ping" as const,
+                          },
+                          EmptyResultSchema,
+                        );
+                      }}
+                    />
+                  </>
                 ) : (
                   <>
                     <ResourcesTab