[NEW] Support "Message read receipt"

[rafaelks]

General information

• PR that implements it in our back-end: [NEW] Message read receipts Rocket.Chat#9717
• Property of the message to look into: unread (Boolean)
• Settings to be verified if feature is enabled:
  • Message_Read_Receipt_Enabled
  • Message_Read_Receipt_Store_Users

Assets

Check.zip

Color when not read by everyone: #999999
Color when read by everyone: #1D74F5

Description

When the setting Message_Read_Receipt_Enabled is enabled, the Message objects are going to have a property called unread. The app needs to map this value and show a "check" information on the right side of the timestamp of the message. When feature is disable, this check image is not displayed.

If the setting Message_Read_Receipt_Store_Users is enabled, when user long press the message, we're going to have a new option called Information that will display only the message in a new screen and below the message there will be a list of users that read the message.

[rafaelks]

This one was closed by #1754.