update jktebop module to publish parameter validation rules

[SteveOv]

Any JKTEBOP parameter validation should be centralized into the jktebop.py module. For this to work it should publish a mechanism for querying the rules. Some options

• is_param_valid(param: str, value: any, task: int) -> bool:
• coerce_param(param: str, value: any, task: int, default_value: any=None) -> any:
  • returns value if it is valid
  • othewise returns default_value if given or nearest valid value if default_value is None

Need to think how/whether to make this handle interdependencies such as LD coeff range depending on the algo.