Support ability to match by regex

[svelterust]

Hey @neg-serg, saw you made some cool changes to this repository. Are the regex changes backwards-compatible with the current code? If so, I don't mind merging it so we can support more stuff.

[neg-serg]

Hi! Yes, the regex changes are mostly backwards-compatible with the current code. The only thing that isn’t working yet is tag support — I was planning to fix that a bit later.

Let me know if you want me to prioritize that.

The reason for this change is that it allows you to write expressions like this:

class:^(firefox|org\.mozilla\.firefox|librewolf|io\.gitlab\.librewolf-community|floorp|one\.ablaze\.floorp|floorpdeveloperedition|yandex-browser|Yandex-browser|chromium|org\.chromium\.Chromium|thorium-browser|com\.thorium\.Thorium|palemoon|net\.palemoon\.PaleMoon)$

As a result, this makes it possible to cycle through all applications that meet the condition

[svelterust]

Yes, when you consider it ready I'll take a look then we can get it merged. As long as the current code and the examples in this repository works as is, it'd be great to get this merged too.