Enhancement: Support Session Excerpts

[BandonRandon]

Currently the Sessions custom post type does not have Excerpt support. Allowing organizers to add an expert can be useful when descriptions are shown multiple at a time for example on the Sessions page ( [session] shortcode ). While the more tag can be used, some presenters add the best part of the description towards the end.

We are finding some sessions also have very long descriptions making it a bit harder to quickly parse data.

Bonus points, if this is the default but full descriptions are supported as an argument to the session shortcode

[Kau-Boy]

Just as for sponsors, I've added the three parameters link, content and 'excerpt_length`. In a sessions at WCUS the question arised why the sessions titles were not linked to the single views, so that's why I also added the link parameter. This one also makes sense if you only show the excerpt.

[coreymckrill]

Noting here that the [sessions] shortcode is now deprecated in favor of the new Sessions block, and the block does support both excerpts and full content when displaying sessions.