docs: Document --verbose flag for cost tracking in CLI

Add documentation for the --verbose flag that displays:
- Live session cost in TUI mode status bar
- Detailed usage summary on exit with token and cache metrics

This helps developers track API costs and understand resource usage
during CLI sessions.

Generated with [Continue](https://continue.dev)

Co-Authored-By: Continue <noreply@continue.dev>
Co-authored-by: nate <nate@continue.dev>

docs/cli/overview.mdx

@@ -134,6 +134,22 @@ cn -p "Update documentation based on recent code changes"
 - Use any model configured in your `config.yaml`
 - Access Continue Mission Control models and configurations
 
+## CLI Options
+
+### Verbose Mode
+
+Use `--verbose` to display cost and usage information during CLI execution:
+
+```bash
+cn --verbose
+```
+
+In verbose mode, Continue CLI displays:
+- **Live session cost** in the bottom status bar (TUI mode)
+- **Detailed usage summary** on exit showing total cost, token usage, and cache metrics
+
+Useful for tracking API costs and understanding resource usage during development.
+
 ## Continue Mission Control Integration
 
 Continue CLI integrates seamlessly with [Continue Mission Control](https://hub.continue.dev) for: