Support routes with mixed slug and static params in same segment

[Atinux]

I believe this is a bug:

routes/[slug].txt.ts:

export default eventHandler(async (event) => {
  return event.context.params;
});

Response when hitting http://localhost:3000/test.txt

{
  "slug.txt": "test.txt"
}

Reproduction: https://stackblitz.com/edit/github-kx4iv8?file=routes%2Findex.ts,routes%2F%5Bslug%5D.txt.ts

[Atinux]

Current workaround:

const slug = event.context.params.slug || (event.context.params['slug.txt'] || '').replace('.txt', '')

Waiting for unjs/radix3#52 to be added to Nitro