[NEW] Read Receipt

[pranavpandey1998official]

@RocketChat/ReactNative

Closes: #542

[pranavpandey1998official]

@diegolmello I couldn't find the custom icon in the file so i just used it as used the icon used in the web app,
2) I have added the receipt icon to user.js I know its not the correct place for it but it will reduce some amount of code for the app do you want me to correct it

[diegolmello]

@pranavpandey1998official Thanks for opening this PR!
It's the correct icon.
Please add the icon after the ts (on the right side).
Also, make sure to add an empty space if the message is unread (to keep dates aligned).

Also switch the action to "Message info" instead of "Read receipt".
This will open a "Message Info" screen with the message and a section "Read receipt".
In the future, we can add reactions too.

[pranavpandey1998official]

@diegolmello can you explain more about 'section'? Is that going to be a button that opens a new screen? As that will be the only option feasible as we have are conditionally allowing user to see Read Receipts only when they have permissions,(also because displaying two large list is not good in single page) and also that will add another component 'message info' are we in a situation to add more code for such two operations i think we should give that option in message action itself..

[diegolmello]

@pranavpandey1998official Ok, leave as it is then.

[pranavpandey1998official]

[diegolmello]

@pranavpandey1998official lint isn't passing

[pranavpandey1998official]

@diegolmello done

[pranavpandey1998official]

resolved

[diegolmello]

@pranavpandey1998official I'll delay this to 1.13, because it requires a migration and there's a beta ongoing already.

[diegolmello]