Enable multiple domains to apply the same rule and add rules to ruleset

[joncrangle]

1. Feat: allow multiple domains to use the same rule using the pipe operator as a delimiter
   This PR parses rule.Domain and splits by the "|" delimiter. This allows you to define several related domains to apply the same injections in ruleset.yaml. For instance:

- domain: www.architecturaldigest.com|www.bonappetit.com|www.cntraveler.com|www.epicurious.com|www.gq.com|www.newyorker.com|www.vanityfair.com|www.vogue.com|www.wired.com

This PR also adds rules to the ruleset for several domains.

[mms-gianni]

Looks good. I'll need a moment to test it.

[mms-gianni]

I'm wondering if this might be the better solution. Maybe even keep the "domain" for backward compatibility.

Pass domain as a string

- domain: www.example.com|www.beispiel.de|www.example.fr
  injections:
    - position: head # Position where to inject the code
      append: | 
        <script>
          window.localStorage.clear();
          console.log("test");
          alert("Hello!");
        </script>

Pass Domains as a list

- domains: 
  - www.example.com
  - www.beispiel.de
  - www.example.fr
  injections:
    - position: head # Position where to inject the code
      append: | 
        <script>
          window.localStorage.clear();
          console.log("test");
          alert("Hello!");
        </script>

[joncrangle]

I agree that your option to pass domains as a list seems like a nicer API.