Document tool versions that `lint-configs/python` correspond to.

[kirkrodrigues]

Request

Each Python lint config was developed against a certain version of the corresponding tool. Newer tools will have new options/defaults, so it's important to know which version of a tool the configs were developed against.

Possible implementation

Add a requirements file with soft version constraints (e.g., black >= 24.42) indicating what tool versions the configs correspond to.