Remove Verdaccio integration

Summary

Remove the Verdaccio integration as it's been decided that Verdaccio is more trouble than it's worth.

Changes Required

• Remove verdaccio/ directory and config
• Remove verdaccio service from compose.override.yml
• Remove verdaccio-storage volume from compose.override.yml
• Remove any Verdaccio-related scripts in scripts/ if present

Context

See ratings#67 (closed) for the discussion that led to this decision.