Create a new custom commitment type.

## Usage

`/ft add-type "name" [--display "Display Name"] [--desc "description"]`

## Arguments

- `"name"` - Required: Type identifier (lowercase, no spaces - will be normalized)
- `--display "NAME"` - Human-readable display name (defaults to capitalized name)
- `--desc "TEXT"` - Description of what this type is for

## Instructions

1. **Normalize Name**: Lowercase, replace spaces with hyphens

2. **Validate**: Check type doesn't already exist

3. **Insert**: Add to commitment_types table with is_default=0

4. **Confirm**:
   ```
   Created type: {name}
   Display: {display_name}
   Description: {description}

   Use it: /ft {name} "your commitment"
   ```

## Examples

```
/ft add-type "habit" --desc "Daily habits to build"
/ft add-type "goal" --display "Long-term Goal" --desc "Big objectives"
```

## Related

- `/ft rename-type "old" "new"` - Rename a type
- `/ft delete-type "name" --move-to "other"` - Delete a type