* [FIX] App removal was moving logs to the trash collection

It may cause a huge delay and memory overload if the app contains a huge history of logs

* Add indexes and expire logs after 30 days

* Add instance id to apps engine logs

* Create a new role `app` based on the role bot

* Reimplement AppUserBridge.create method

* checkUsernameAvailability before creating app user

* Notify admin when meeting Apps_User_Already_Exists error

* Implementing createAppUser in Rocket.Chat side

* Prevent "App users" from logging-in on Rocket.Chat

* Add new user type 'app'

* Change active user count query

* Add createdAt automatically to users created via app

Co-authored-by: Upendra Reddy <upendrareddy2511@gmail.com>
Co-authored-by: Douglas Gubert <d-gubert@users.noreply.github.com>

* Enable apps change properties of the sender on the message

* Return from sendMessage method

Co-authored-by: Diego Sampaio <chinello@gmail.com>