Migrate to Vite+ (vite-plus) unified toolchain

Replace Vite/Vitest with vite-plus, update WASM loading to native Vite 8
?init pattern, switch React compiler to @rolldown/plugin-babel, and
migrate git hooks from husky to vite-hooks.

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

src-web/components/core/Editor/twig/twig.test.ts

@@ -1,6 +1,6 @@
 // biome-ignore-all lint/suspicious/noTemplateCurlyInString: We're testing this, specifically
 
-import { describe, expect, test } from 'vitest';
+import { describe, expect, test } from 'vite-plus/test';
 import { parser } from './twig';
 
 function getNodeNames(input: string): string[] {