Support AdGuard cosmetic filter variants

[antonok-edm]

Some AdGuard lists use #$# rather than :style() to add a custom style to elements. uBO supports both options. adblock-rust should as well.

See also here for documentation on location modifiers.

[antonok-edm]

As of brave/adblock-resources#90, Brave is shipping a regional list with these cosmetics - they are currently ignored.

[superlex]

I hope to see these features soon.

[superlex]

Hello, any news?