[UX] Work through org design details in library

[jonbell-lot23]

Design POV:

Link to Figma

I discussed with @ryanjduffy and @jasonLaster in person, here's the summary:

• There should be a spot to show enterprise logos at the top. Notice how I made the background white -- that's because this is typically what ends up happening on enterprise installs. Transparency is often too much to ask 😂
• If you are part of multiple orgs, we'll have a little menu to switch between orgs
• Notice how everything in the sidebar is on the same level, not indented. This is by design. We're trying every team as a peer to each other, and not showing a single unified "org view."
• Notice the different icons (we can pick different icons later). Standard teams will have a certain icon, test suite teams will have another, and things like My Library and Shared with me will have another.
• "Shared with me" isn't strictly part of the org information architecture but it's a thing we should expect in our future

[jonbell-lot23]

Process note: I'm going to mark this as done because that's how I track my tasks on the iteration. When we create a ticket to implement this work in the code, we can refer back to this work as a starting point.