Add a 2x time multiplier button on scouting page

This would be useful when re-scouting a match while watching a video at 2x playback. Ensure that this control isn't easily hit by mistake. When this control is enabled, the timer would run at 2x speed to ensure the timestamps are still accurate.

Start at the scouting page and locate the timer implementation and existing playback controls. Add a clearly separated 2x control that is not easily triggered accidentally, and verify that enabling it makes the timer advance at twice the speed while keeping timestamps accurate.

Written by the indexing model from the issue text.