Goal: 

• Complete implementation of RepositoriesView
  • Add modal fill behavior
  • Edit modal
  • column widgets for repositories table
• Complete implementation of navigations to RepositoriesView
  • edit navigation
  • am_i_here implementations for nav classes

Acceptance Criteria:

• Can navigate to repository edit
• Can fill add and edit modals via `RepositoriesView.add_custom.fill()`
• Can delete repository via table column widget.