Permissions Parity with AdGuard iOS

### Problem Description
Currently, AdGuard for Safari extension requests permission to read data and alter data and history from all domains. I want to be clear that although I trust AdGuard, I think it's always a good idea to grant (inherently powerful) privileges on an as-needed basis.

### Proposed Solution
AdGuard's extension on Safari for iOS currently requests permissions on a domain-by-domain basis, that is, I can explicitly choose which sites AdGuard has access to and which ones it does not. I propose implementing this permissions model on AdGuard for Safari (on macOS).

### Alternatives Considered
None; I believe this proposal takes advantage of Safari's native features and (hopefully) the existing codebase of the AdGuard on iOS, although I am open to suggestions otherwise!

### Additional Information
Thanks for reviewing this request!