Add report room dialog button/dialog.

[Half-Shot]

Requires matrix-org/matrix-js-sdk#4753
For element-hq/element-meta#2743

This:

• Adds a new room report dialog.
• Inserts a the report button just below the leave button in the room summary card.

This needs design review before it can progress.

Checklist

• Tests written for new code (and old code if feasible).
• New or updated public/exported symbols have accurate TSDoc documentation.
• Linter and other CI checks pass.
• I have licensed the changes to Element by completing the Contributor License Agreement (CLA)

[JordanConnor]

Perhaps some simplified wording?

Report Room
Report this room to your homeserver admin. This will send the room’s unique ID, but if messages are encrypted, the administrator won’t be able to read them or view shared files.

Reason:
Reason for reporting...

Cancel | Send Report