Header and footer are gonna be added in a separate PR as they require
changes to Picker trait that I feel are separate from the contents of
this PR.
Release Notes:
- N/A
This PR ports the `recent_projects` crate to Zed2 (`recent_projects2`).
Absent from this PR is wiring up the "Recent Projects" item in the title
bar. We'll come back to that soon.
Release Notes:
- N/A