Implement UI for history visibility acknowledgement.

[kaylendog]

Shows a banner above the message composer whenever a user opens a room with non-join history visibility, which they can dismiss.

• Whenever a user opens an encrypted room with non-join history visibility, show them a banner, unless we have already marked it as dismissed.
• Whenever a user opens an encrypted room with joined history visibility, we unmark it as dismissed.

Issue: element-hq/element-meta#2875

Checklist

• I have read through review guidelines and CONTRIBUTING.md.
• 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)

[kaylendog]

I'm wondering if this would be better off as a floating alert above the UI - would conflict less with the identity reset dialog.

[florianduros]

@kaylendog this is a question for the design team. Where are the figma design for this banner?

[kaylendog]

@kaylendog this is a question for the design team. Where are the figma design for this banner?

Here (for EW)!

[kaylendog]

Opening this up for review, since I can't make any headway on the CI failures:

• The Playwright tests need their snapshots updating, which I can't do locally since this (apparently) needs rootful docker;
• The Jest unit tests are failing for an unknown reason which I can't replicate locally - we suspect this may be cache related?

[florianduros]

Each components in shared component has its own folder. imo RoomStatusBarHistoryVisible should be in packages/shared-components/src/room/RoomStatusBarHistoryVisible.

The RoomStatusBarHistoryVisible is missing at least a render test and a check that onClose is correctly binded.

[kaylendog]

Converting to a draft for now while I consolidate the existing identity reset warnings.