adds SocialIcon to Framework, SocialFooter to Components

[jkaunert]

Adds a SocialFooter component with a SocialIcon struct to allow for easy addition of a social footer.

usage:

Group {
    SocialFooter([
      SocialIcon(
          name: "medium",
          targetURL: "https://medium.com/alwaysmakingstuff"
          ),
      SocialIcon(
          name: "github",
          targetURL: "https://github.com/always-making-stuff"
          ),
      SocialIcon(
          name: "twitch",
          targetURL: "https://twitch.tv/alwaysmakingstuff"
          ),
      SocialIcon(
          name: "YouTube",
          targetURL: "https://youtube.com/alwaysmakingstuff"
          ),
      SocialIcon(
          name: "bluesky",
          targetURL: "https://bsky.app/profile/joshuaauhsoj.bsky.social",
          customImageURL: "/images/social/bluesky.svg"
          ),
      ])
    IgniteFooter()
}

[twostraws]

Hello! Sorry for taking so long to get around to reviewing this. I like the idea a lot, and think it will provide a lot of benefit to suers. However, a few things stuck out for me:

• I don't think using strings is a good idea for known services, and would prefer to see an enum for common networks such as Medium, Mastodon, etc.
• I would have expected users to provide only the relevant part of the URL for a given service, e.g. SocialIcon(server: .github, user: "twostraws"). For places where there are multiple servers, e.g. Mastodon, that might work best as an associated value to the enum case, e.g. .mastodon(server: "mastodon.social").
• Both the foreground style and opacity modifiers feel unnecessary, like they should be at the user's discretion rather than being forced by us.
• I don't see why SocialFooter is needed at all. Again, users can create that themselves.

[twostraws]

I haven't heard back on this in a month. I'll leave it a few more weeks, but if I don't hear anything further I'll close this PR.

[jkaunert]

Sorry, been a busy month for me too. I'll make the suggested edits.