Summary

Improve cfl's init command to reuse existing values and enhance config test output to match jtk's more informative style.

Changes Required

init command

• Reuse existing config values when re-running init - currently starts with blank Config{}, should load existing config and pre-populate the form so users can selectively update fields

config test command

• Show authenticated user details on success (like jtk does) instead of just "success!" - display user's display name, email, and account info

TLDR

Pre-populate init form with existing config values, and show user details in config test output.