web-types: hx-on:: pattern fails to resolve compound (colon-containing) HTMX event names

## Summary

Some event names (`hx-on:load`, `hx-on:click`) resolve fine in IntelliJ IDEA. Others (`hx-on::before:request`, `hx-on::after:request`, etc.) — are flagged as "Unrecognized HTMX event".

## Repro

```html

```

IDE underlines `before:request` as unrecognized.

## Environment

- htmx: 4.0.0 (https://four.htmx.org/reference/attributes/hx-on)
- File: `editors/jetbrains/htmx.web-types.json`

Open editors/jetbrains/htmx.web-types.json and inspect how hx-on event patterns are declared for simple names such as load and click. Update the pattern handling for colon-containing names such as before:request, then verify the provided HTML reproduction in IntelliJ IDEA no longer reports an unrecognized event.

Written by the indexing model from the issue text.