Declare click as a direct dependency

[Anmolnoor]

Summary

src/foundation/cli.py imports click directly, but click was never declared in pyproject.toml — it came in transitively through typer. Newer typer (>=0.26) dropped click as a dependency, so a fresh pip install -e ".[dev]" now resolves without click and the test suite errors at collection:

ModuleNotFoundError: No module named 'click'

This adds click>=8.0,<9.0 to dependencies, since cli.py imports it directly.

Verification

• Recreated the venv from scratch (Python 3.12, no manual click install) → click installs from the declared dependency alone.
• Full suite: 380 passed.
• ruff check clean.

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