fix: pin click<8.2 to prevent CLI crash on startup

[octo-patch]

Fixes #294

Problem

Running pyspur init (or any CLI command) fails immediately with:

TypeError: Secondary flag is not valid for non-boolean flag.

The full traceback ends at click/core.py inside Option.__init__. This is a breaking change introduced in click 8.2.0, which added strict validation that secondary flags (e.g., --flag/--no-flag) may only be applied to boolean options. typer==0.9.0 (currently pinned) generates option definitions that trigger this check when click 8.2+ is installed.

The workaround confirmed by users is pip install "click<8.2", but without an explicit upper bound in pyproject.toml the broken version gets pulled in automatically.

Solution

Add "click<8.2" as an explicit dependency constraint. This keeps typer==0.9.0 working correctly without requiring an immediate typer upgrade (which would risk larger API-level breaking changes).

Testing

• Installing with pip install "click<8.2" restores pyspur init functionality (confirmed by multiple users in the issue thread)
• The constraint is consistent with what typer 0.9.0 was designed and tested against