* Added base folder structure for Newsfeed plugin
* Added base folders for lib and component
* Added newsfeed button to navigation controls on the right side
* add getApi() to return api data observable (#49581)
* Added flyout base body and provided EuiHeaderAlert component inside the newsfeed plugin
* Moved newsfeed plugin to OSS and added for the styles purpose new folder for legacy plugin 'newsfeed' with the same id to support this
* Added subscribe on fetch newsfeed change
* Add NewsfeedApiDriver class (#49710)
* add NewsfeedApiDriver class
* fix xpack prefix
* add corner case handling
* Added data binding to the ui
* added EuiHeaderAlert style overrides (#49739)
* Fixed due to comments on PR
* add missing fields to NewsfeedItem and FetchResult
* fix templating of service url
* gracefully handle temporary request failure
* Mapped missing fields for data and badge
* Fixed typos issues
* integrate i18n.getLocale()
* allow service url root to be changed in dev mode
* replace a lot of consts with config
* fix flyout height (#49809)
* Add "error" field to FetchResult: Error | null
* simplify fetch error handling
* Do not store hash for items that are filtered out
* add expireOn in case it is useful to UI
* always use staging url for dev config
* unit test for newsfeed api driver
* simplify modelItems
* Fixed eslint errors
* Fixed label translations
* Add unit test for concatenating the stored hashes with the new
* add newsfeed to i18n.json
* Fixed expression error
* --wip-- [skip ci]
* fix parse error
* fix test
* test(newsfeed): Added testing endpoint which simulates the Elastic Newsfeed for consumption in functional tests
* add tests for getApi()
* add tests for getApi
* Added no news page
* fix fetch not happening after page refresh with sessionStorage primed
* test(newsfeed): Added testing endpoint which simulates the Elastic Newsfeed for consumption in functional tests
* Added loading screen
* Small fixes due to comments
* Fixed issue with stop fetching news on error catch
* test(newsfeed): Configure FTS to point newsfeed to the simulated newsfeed endpoit
* Fixed browser error message: Invariant Violation: [React Intl] Could not find required `intl` object. <IntlProvider> needs to exist in the component ancestry.
* Fixed typo issue in label name
* polish the code changes
* Add simple jest/enzyme tests for the components
* honor utc format
* Filter pre-published items
* Fall back to en
* retry tests
* comment clarfication
* Setup newsfeed service fixture from test/common/config
* Added base functional tests for newsfeed functionality
* valid urlroot is for prod
* add documentation for the supported enabled setting
* more urlRoot
* --wip-- [skip ci]
* add the before for fn
* add ui_capabilties test
* update jest snapshot
* Fixed failing test
* finish newsfeed error functional test
* include ui_capability config
* error case testing in ci group 6
* refactor(newsfeed): moved newsfeed api call so that it is done before its use
* code polish
* enabled newsfeed_err test in CI
