Adds the ability to create a dev container definition from scratch.
Additionally, separates devcontainer logic out into its own crate, since
it was getting sufficiently complex to separate from the
`recent_projects` crate.
A screen recording of the modal experience:
https://github.com/user-attachments/assets/f6cf95e1-eb7b-4ca3-86c7-c1cbc26ca557
Release Notes:
- Added modal to initialize a dev container definition in the project
with `projects: initialize dev container`
- Added podman support for dev container actions with the `use_podman`
setting
- Improved devcontainer error handling
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Co-authored-by: Sam Coward <idoru42@gmail.com>
