The 'data/' directory created by 'sirchmunk init' is unused and undocumented

Description

When running sirchmunk init, a data/ directory is created as part of the working directory structure (cli/cli.py:216-224):

directories = [
    work_path,
    work_path / "data",       # <-- this one
    work_path / "logs",
    work_path / ".cache",
    work_path / ".cache" / "models",
    work_path / ".cache" / "knowledge",
    work_path / ".cache" / "history",
    work_path / ".cache" / "settings",
]

However, this data/ directory appears to be unused and undocumented:

1. No code references: No other part of the codebase reads from or writes to this directory. It is only created during init.
2. Not a default search path: SIRCHMUNK_SEARCH_PATHS does not default to data/, so Sirchmunk won't automatically search files placed there.
3. Missing from documentation: The README's "Data Storage" section documents the .cache/ structure but does not mention data/.

Suggestion

Either:

• Option A: Remove the data/ directory from init if it serves no purpose, to keep the workspace clean.
• Option B: Give it a clear role — e.g., make it a default search path, document it as the recommended location for user files, and mention it in the README.

Start in cli/cli.py:216-224 and inspect the README's "Data Storage" section and the SIRCHMUNK_SEARCH_PATHS defaults. Determine whether data/ should be removed or given a documented search-path role; done means the chosen behavior is implemented consistently and the README reflects it.