Chore: remove lib/rocketchat step 2 (#4035)

* create index file

* remove roomTypeToApiType from rocketchat and fix imports

* move TOKEN_KEY to const file

* move CURRENT_SERVER to const file

* move CERTIFICATE_KEY to const file

* getRoom

* rename getSlashCommands

* getSlashCommands

* readMessages

* getRooms

* loadThreadMessages

* loadNextMessages

* loadSurroundingMessages

* loadMessagesForRoom

* loadMissedMessages

* clearCache

* canOpenRoom

* setUser

* userPreferencesMethods

* getCustomEmojis

* callJtisi

* triggerActions

* getPermissions

* getRoles

* getSettings

* getUsersPresence

* logout

* sendFileMessage

* shareExtension

* sendMessage

* enterpriseModules

* getPermalinks

* search

* change RocketChat.metodo to direct call

* fix types

* Fix login

* Fix createChannel

* migrate service methods to Service.method call

* change call directly to RocketChat because the use of this

* rollback

* rollback

* fix create discussion

* fix import

Co-authored-by: Diego Mello <diegolmello@gmail.com>