Improve social sharing options

[SteelWagstaff]

As an author (or a reader), I want to be able to share the contents of my book on social media in an attractive way so that I can promote the content that I have published.

I should be able to share content easily to Facebook, Instagram, Twitter, Mastodon, and LinkedIn. I should be able to share the book's home page as well as individual parts/chapters of the book. When sharing content, the default share should include the book's cover image, title and a short description from the book's metadata. Users should be able to edit the default message and add/remove tags and mentions as desired.