Solr search: Results formatting and templating

[finnlewis]

Agree if we want to move the templating, display configuration into localgov drupal. If so it needs to go into the modules that supply the content types - they already have search results and search index display modes - can be a discussion about where templates live (module or theme).

Things to do:

• [ ] Decide where view modes and templates live for sitewide search results
• [ ] Confirm how to display search results for service pages / service landing pages
• [ ] Define a view mode for 'sitewide search' to avoid namespace clash with 'search results' in news / directories etc.

[finnlewis]

I'm happy to try to take a look at this if I have time this week, but @andybroomfield might also get a chance!