Remove / Split out social media sharing to Plugin

Proposed functionality

Remove the Twitter (now renamed X) and Facebook links for sharing. Suggest splitting functionality out into a plugin instead, which would allow additional social media services as well.

Use case

Twitter has been renamed to X and the service links are no longer functional for sharing there. Additionally, Facebook often changes its share process. Finally, additional other social media services and sites exist which may benefit from being able to share shortlinks.

Potential solution

Split this functionality out into a plugin per service and/or split this functionality out into a separate section that can be altered or updated for various services.