/export

Export usage data in various formats (json, csv, markdown)

Export the usage tracking data.

## Supported Formats

- **json**: Full data export in JSON format
- **csv**: Tabular data for spreadsheet analysis
- **markdown**: Human-readable report

## Process

1. Determine the format from the argument (default: json)

2. Run the export:
   

3. Offer to save to a file:
   - JSON: `~/.claude/usage-tracker/export-[timestamp].json`
   - CSV: `~/.claude/usage-tracker/export-[timestamp].csv`
   - Markdown: `~/.claude/usage-tracker/report-[timestamp].md`

4. If the user wants a file, write it to the appropriate location.

## Example Usage

- `/usage-tracker...