[Do not merge] Enterprise EOL: Replace tiles on docs index page (#2261)
[Do not merge] Enterprise EOL: Replace tiles on docs index page (#2261)

* Enterprise EOL: Replace tiles on docs index page

* Add link to resource library and switch places with Discourse tile
sensu/sensu-docs,sensu/sensu-docs,sensu/sensu-docs,sensu/sensu-docs,sensu/sensu-docs