[Sync EN] uri: Include method documentation in class documentation

PR: `https://github.com/php/doc-en/pull/5468` (2026-04-06)

**Новые файлы EN (ещё не переведены)**
- `reference/uri/uri.rfc3986.uri.xml`
- `reference/uri/uri.whatwg.invalidurlexception.xml`
- `reference/uri/uri.whatwg.url.xml`
- `reference/uri/uri.whatwg.urlvalidationerror.xml`
- `reference/uri/uri/rfc3986/uri/getport.xml`
- `reference/uri/uri/whatwg/url/getport.xml`

