fix: resolve Prism CJS loading crash in Vite dev mode

Remove the prismSetup module that imported prismjs directly — it
caused Vite to pre-bundle prismjs into a separate chunk from
@lexical/code-prism, breaking the CJS require chain.  Language
components tried to call Prism.languages.extend() before the base
grammars were available, crashing the app.

Instead, add optimizeDeps.include for prismjs and @lexical/code-prism
so Vite pre-bundles them together, preserving the correct CJS
evaluation order within a single chunk.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

src/renderer/main.tsx

@@ -1,7 +1,6 @@
 import { StrictMode } from 'react';
 import { createRoot } from 'react-dom/client';
 
-import '@renderer/lib/prismSetup';
 import App from '@renderer/App';
 import '@renderer/styles.css';