Improve Ghost integration

Right now the Ghost integration only publishes Meta Title and Meta Description.

Requesting X and Facebook are handled too with a picture, title, and description — bearing in mind that X and Facebook have different character lengths than meta description

"og_image": null,

"og_title": null,

"og_description": null,

"twitter_image": null,

"twitter_title": null,

"twitter_description": null,

"meta_title": null,

"meta_description": null,