[Sync EN] optimize swoole event docs

[github-actions]

PR: https://github.com/php/doc-en/pull/4774 (2026-08-12)

Файлы RU для обновления

• reference/swoole/swoole.event.xml
• reference/swoole/swoole/event/add.xml
• reference/swoole/swoole/event/defer.xml
• reference/swoole/swoole/event/del.xml
• reference/swoole/swoole/event/exit.xml
• reference/swoole/swoole/event/set.xml
• reference/swoole/swoole/event/wait.xml
• reference/swoole/swoole/event/write.xml

Новые файлы EN (ещё не переведены)

• reference/swoole/swoole/event/cycle.xml
• reference/swoole/swoole/event/dispatch.xml
• reference/swoole/swoole/event/isset.xml