Function treeCommand

treeCommand(
targetPath: string | undefined,
options: TreeCliOptions,
): Promise<void>
CLI command handler that renders the markdown tree under a path with documentation statistics.

The scan is read-only, so there is no dry-run mode. Rendering is deterministic: directories before files, each group alphabetically, node_modules/.git/dist excluded. Word counts follow the countWords rule: whitespace-separated tokens outside fenced code blocks and inline code spans. Internal links are checked for file existence only (no network).
Parameters
- targetPath: string | undefined
  Directory or markdown file to scan (defaults to the current directory)
- options: TreeCliOptions
  CLI options
Returns Promise<void>
Example
```
- markmv tree
  - markmv tree docs/ --max-depth 2
  - markmv tree docs/ --format json
```
- Defined in commands/tree.ts:543