Run oxfmt across repo, add format script and ignore config

Format all non-generated files with oxfmt via `vp fmt`. Add
.oxfmtignore to skip bindings/ and wasm-pack output. Add npm
format script and update DEVELOPMENT.md docs.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src-web/lib/queryClient.ts

@@ -1,15 +1,15 @@
-import { QueryCache, QueryClient } from '@tanstack/react-query';
+import { QueryCache, QueryClient } from "@tanstack/react-query";
 
 export const queryClient = new QueryClient({
   queryCache: new QueryCache({
     onError: (err, query) => {
-      console.log('Query client error', { err, query });
+      console.log("Query client error", { err, query });
     },
   }),
   defaultOptions: {
     queries: {
       retry: false,
-      networkMode: 'always',
+      networkMode: "always",
       refetchOnWindowFocus: true,
       refetchOnReconnect: false,
       refetchOnMount: false, // Don't refetch when a hook mounts