⛰️✨ `Sections`

[zspencer]

• Rooms are Convene's sub-organizational unit below https://github.com/zinc-collective/convene/issues/1154. https://github.com/zinc-collective/convene/issues/709 are placed in https://github.com/zinc-collective/convene/issues/1155

• From an Interaction Design perspective, https://github.com/zinc-collective/convene/issues/1155 are like a screen on a Mobile App or a landing page on a Website. Every https://github.com/zinc-collective/convene/issues/1154 has a default room, which we call the Entrance

Use Cases

• [x] #1965
• [x] ✨ Section: Adding Sections to Spaces
• [x] ✨ Section: Removing Sections from Spaces
• [x] ✨ Section: Limit Sections to Spaces

Data Model

• [x] #1961
• [x] #2228

Design

• [ ] #1472

Bugs

• [x] https://github.com/zinc-collective/convene/issues/1841