* [public] Register Enterprise search plugin

+ move new Home strings to constants

* [server] Register plugin access/visibility

* Set up Enterprise Search Kibana Chrome

- Add SetEnterpriseSearchChrome
- Update Enterprise Search breadcrumbs to link to new overview plugin (+ update overview plugin URL per team discussion)
  - Add ability to break out of React Router basename by not using history.createhref
  - Update createHref mock to more closely match Kibana urls (adding /app prefix)
- Minor documentation fix

* Set up Enterprise Search plugin telemetry

- client-side: SendEnterpriseSearchTelemetry
- server-side: register saved objects, usage collector, etc.

* Enterprise search overview views (#23)

* Add formatTestSubj util

This allows us to correctly format strings into our casing for data-test-subj attrs

* Add images and stylesheet

* Add product card component

* Add index component

* Remove unused styles

* Fix inter-plugin links
- by add shouldNotCreateHref prop to RR helpers
- similiar to breadcrumb change

* Fix/clean up CSS

- Prefer EUI components over bespoke CSS (e.g. EuiCard)
- Remove unused or unspecific CSS
- Pull out product card CSS to its component
- Fix kebab-cased CSS classes to camelCased

* Clean up ProductCard props

- Prefer passing in our plugin consts instead of separate props
- Move productCardDescription to constants
- Update tests

* Add telemetry clicked actions to product buttons

+ revert data-test-subj strings to previous implementation
+ prune format_test_subj helper by using lodash util directly

* [PR feedback] Add new plugin to applicationUsageSchema per telemetry team request

* Fix failing functional navLinks test

* Fix telemetry schema test

* [Perf] Optimize assets size by switching from 300kb SVG to 25kb PNG

* Only show product cards if the user has access to that product

- adds access checks
- fixes flex/CSS to show one card at a time

Co-authored-by: Scotty Bollinger <scotty.bollinger@elastic.co>