Generic binding of messages to social media sites
There should be an abstract definition of a post to social media systems. Currently only one implementation is added: The twitter cards. See more details here
AC:
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The frontend can generate a page with either twitter cards or opengraph tags -
Before enabling the feature the user must opt-in by a warning message -
The opt-in is counted only per session (flag in sessionStorage) -
The user must be able to Log into his twitter account