client/web: start using swr for some fetching

Adds swr to the web client, and starts by using it from the
useNodeData hook.

Updates #10261

Signed-off-by: Sonia Appasamy <sonia@tailscale.com>

client/web/src/index.tsx

@@ -10,8 +10,10 @@
 
 import React from "react"
 import { createRoot } from "react-dom/client"
+import { swrConfig } from "src/api"
 import App from "src/components/app"
 import ToastProvider from "src/ui/toaster"
+import { SWRConfig } from "swr"
 
 declare var window: any
 // This is used to determine if the react client is built.
@@ -26,8 +28,10 @@ const root = createRoot(rootEl)
 
 root.render(
   <React.StrictMode>
-    <ToastProvider>
-      <App />
-    </ToastProvider>
+    <SWRConfig value={swrConfig}>
+      <ToastProvider>
+        <App />
+      </ToastProvider>
+    </SWRConfig>
   </React.StrictMode>
 )