Support for cap_html_filtering condition

### Issue Details

Similar: https://github.com/AdguardTeam/AdguardBrowserExtension/issues/2146

https://github.com/gorhill/uBlock/wiki/Static-filter-syntax#if-condition

Sometimes an annoyance or popup case can be dealt with by either removing the script from that page entirely (**HTML filtering**) or with the use of **scriptlets** and it makes sense that the scriptlet rules don't get injected into a page that HTML filtering has already been applied to.

So I use this in [my list](https://github.com/MasterKia/PersianBlocker/blob/main/PersianBlocker.txt):
```adb
example.com##^script:has-text(BadStuff)
!#if !cap_html_filtering
example.com##+js(FirstScriptlet)
example.com##+js(SecondScriptlet)
example.com##+js(ThirdScriptlet)
!#endif
```

For AdGuard it _can_ be translated into `!#if (!adguard_app_windows && !adguard_app_mac && !adguard_app_android && !adguard_ext_firefox)` but it makes sense to have a dedicated condition for this.

### Proposed solution

`!#if cap_html_filtering`

### Alternative solution

`!#if (!adguard_app_windows && !adguard_app_mac && !adguard_app_android && !adguard_ext_firefox)`