Events for controller regained

[AtifMahmud]

Description

Every controller lost tracking event should have a controller regained event. This will allow these events to define a time window in which the controllers are "lost" - this in turn will help SE disable/grey out controllers and hands to convey that information.

Height Task ID(s) (If applicable): https://c3d.height.app/T-5816

Type of change

• [x] New feature (non-breaking change which adds functionality)
• [x] This change requires a documentation update

Checklist

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my own code
• [x] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings
• [x] I have assigned this PR to myself in GitHub
• [x] I have assigned and notified Reviewers for this PR