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/hooks/useDebouncedState.ts

@@ -1,6 +1,6 @@
-import { debounce } from '@yaakapp-internal/lib';
-import type { Dispatch, SetStateAction } from 'react';
-import { useMemo, useState } from 'react';
+import { debounce } from "@yaakapp-internal/lib";
+import type { Dispatch, SetStateAction } from "react";
+import { useMemo, useState } from "react";
 
 export function useDebouncedState<T>(
   defaultValue: T,