Export room sessions to csTimer

[coder13]

Users want to export a Let's Cube session for analysis or archiving in csTimer.

Feedback source:

• Have the ability to export a session into cstimer.
• Requests to share/generate text or images with times are related but can be handled later.

Acceptance ideas:

• Provide an export action for a room/session.
• Include times, penalties, events, scrambles if available, and timestamps if useful.
• Use a format that csTimer can import or that is easy to transform into csTimer format.
• Consider privacy for multi-user rooms.