fix: typedroute routes for window (vercel#46099)

This pr filters out `non-page` files for `pages` dir and fixes path for windows os

## Bug

- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Errors have a helpful link attached, see [`contributing.md`](https://github.com/vercel/next.js/blob/canary/contributing.md)

## Feature

- [ ] Implements an existing feature request or RFC. Make sure the feature request has been accepted for implementation before opening a PR.
- [ ] Related issues linked using `fixes #number`
- [ ] [e2e](https://github.com/vercel/next.js/blob/canary/contributing/core/testing.md#writing-tests-for-nextjs) tests added
- [ ] Documentation added
- [ ] Telemetry added. In case of a feature if it's used or not.
- [ ] Errors have a helpful link attached, see [`contributing.md`](https://github.com/vercel/next.js/blob/canary/contributing.md)

## Documentation / Examples

- [ ] Make sure the linting passes by running `pnpm build && pnpm lint`
- [ ] The "examples guidelines" are followed from [our contributing doc](https://github.com/vercel/next.js/blob/canary/contributing/examples/adding-examples.md)

packages/next/src/build/webpack/plugins/next-types-plugin.ts

@@ -220,15 +220,23 @@ export class NextTypesPlugin {
       return
     }
 
+    // Filter out non-page files in pages dir
+    if (
+      !isApp &&
+      /[/\\](?:_app|_document|_error|404|500)\.[^.]+$/.test(filePath)
+    ) {
+      return
+    }
+
     const page = isApp
       ? normalizeAppPath(path.relative(this.appDir, filePath))
       : '/' + path.relative(this.pagesDir, filePath)
 
     let route =
       (isApp
-        ? page.replace(/\/page\.[^./]+$/, '')
-        : page.replace(/\.[^./]+$/, '')
-      ).replace(/\/index$/, '') || '/'
+        ? page.replace(/[/\\]page\.[^./]+$/, '')
+        : page.replace(/\.[^./]+$/, '').replace(/[/\\]index$/, '')
+      ).replace(/\\/g, '/') || '/'
 
     if (isDynamicRoute(route)) {
       route = route