Fix(typedRoutes): fixed files from directories other than pages and a…

…pp getting into Route (#47184)

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## For Maintainers

- Minimal description (aim for explaining to someone not on the team to understand the PR)
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### What?

This PR fixes the issue where files from other directories are allowed into type `Route`.

### Why?

It is caused by the fact that `this.collectPage` only blocked files in `appDir` that are not `page.js` and `pages/`'s `_app.js`, `_document.js`,...

### How?

This fixes that by blocking files that are not in any of these directories as well.

Closes NEXT-
Fixes #47151

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

@@ -371,6 +371,11 @@ export class NextTypesPlugin {
  if (!this.typedRoutes) return
 
  const isApp = filePath.startsWith(this.appDir + path.sep)
+ const isPages = !isApp && filePath.startsWith(this.pagesDir + path.sep)
+
+ if (!isApp && !isPages) {
+ return
+ }
 
  // Filter out non-page files in app dir
  if (isApp && !/[/\\]page\.[^.]+$/.test(filePath)) {
@@ -379,7 +384,7 @@ export class NextTypesPlugin {
 
  // Filter out non-page files in pages dir
  if (
- !isApp &&
+ isPages &&
  /[/\\](?:_app|_document|_error|404|500)\.[^.]+$/.test(filePath)
  ) {
  return