Fix missing repositories and webpack startup issues

What does this merge request do and why?

Fixes the issue where the codebases don’t exist for projects in GDK when using a remote development workspace. This is achieved by moving the repositories directory from the bootstrapped GDK.

Also, enabled Vite by default to resolve an issue with Webpack not starting.

Closes #2123 (closed)

How to set up and validate locally

1. Create a new workspace at https://gitlab.com/-/remote_development/workspaces/new.
2. Choose 2123-fix-empty-seed-repositories as the Git reference.
3. Click on the workspace.

After the above steps, I confirmed that the seeded repositories are no longer empty.

Impacted categories

The following categories relate to this merge request:

• gdk-reliability - e.g. When a GDK action fails to complete.
• gdk-usability - e.g. Improvements or suggestions around how the GDK functions.
• gdk-performance - e.g. When a GDK action is slow or times out.

Merge request checklist

• This change is backward compatible. If not, please include steps to communicate to our users.
• Tests added for new functionality. If not, please raise an issue to follow-up.
• Documentation added/updated, if needed.
• Announcement added, if change is notable.
• gdk doctor test added, if needed.
• Add the ~highlight label if this MR should be included in the CHANGELOG.md.