feat: add the ability to pass generic parameters to features

[nbatterham]

Description

Allow parameters to be passed into features for more complex feature flag calculation

Resolves #37

Type of change

Please delete options that are not relevant.

• Breaking change (fix or feature that would cause existing functionality to
  not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Unit tests updated and executed

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I own the code that I am submitting or have the permission to share it
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass with my changes

[github-actions]

Some changes are required

actioned