Bypass vite server watch config in dev

Author: c0va23

.changeset/wet-walls-camp.md

@@ -0,0 +1,5 @@
+---
+"@react-router/dev": patch
+---
+
+Copy `server.watch` config options from `vite.config.(ts|js)` file to child vite server in development mode.

packages/react-router-dev/vite/plugin.ts

@@ -1448,7 +1448,7 @@ export const reactRouterVitePlugin: ReactRouterVitePlugin = () => {
           cacheDir: "node_modules/.vite-child-compiler",
           mode: viteConfig.mode,
           server: {
-            watch: viteConfig.command === "build" ? null : undefined,
+            watch: viteConfig.command === "build" ? null : viteConfig.server.watch,
             preTransformRequests: false,
             hmr: false,
           },