[Story] Add ability to report a room

[bmarty]

Description

Element Android recently get rejected from the PlayStore due to the lack for the user to be able to report a room (reporting a specific event is already supported).

I want to be proactive on Element X and avoid having to deal with the same issue, which often force us to negotiate with Google and work in a hurry.

• As a user of Element X mobile
• I want to be able to report a room to the homeserver moderator
• So that bad content can be removed or any other actions can be taken by the moderator

Acceptance criteria

• A new action in the room setting is added so that user can report a room

Size estimate

None

Dependencies

• None

Out of scope

• Nothing

Open questions

Subtasks

Android

• [Task] Report a room element-x-android#4315

iOS

• [Task] Report a room element-x-ios#3836

Rust

• Add Room.report API matrix-org/matrix-rust-sdk#4681

Other

Sign-off

Android

• Design sign-off on completion
• QA sign-off on completion
• Product sign-off on completion

iOS

• Design sign-off on completion
• QA sign-off on completion
• Product sign-off on completion