Add a schedule toggle

What does this MR do and why?

Add a schedule toggle and a basic API for modifying schedules.

NOTE: The frontend state is not synced between the mobile and desktop views when changing breakpoints. A full page reload will resolve this.

Screenshots or screen recordings

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How to set up and validate locally

1. Setup the branch
2. Create a schedule
3. Go to the schedule list page

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• Have you checked this doesn't interfere/conflict/duplicate someone elses work?
• Have you fully tested your changes?
• Have you resolved any lint issues?
• Have you assigned a reviewer?
• Have you applied correct labels?
• Have you updated CHANGELOG.md?