Add unit tests for getConfigDir path resolution across platforms

[404-Page-Found]

Task summary

Document what commit-echo suggest --verbose prints (model, style profile summary, truncation info) and when this mode is useful.

Why this is a good first issue

This is a low-risk docs improvement that helps users debug provider/model behavior without reading source.

Suggested files or areas

• README.md
• Reference behavior in src/commands/suggest.ts

Acceptance criteria

• Add a short --verbose section with sample output.
• Explain each field in plain language.
• Keep examples consistent with current CLI output wording.

Extra context

Verbose mode exists but isn’t clearly described in the current README usage narrative.