Evaluate whether to convert wc_kb Observable to the same underlying methods as wc_lang Observable

[bilalshaikh42]

Currently, wc_kb observable class depends on the old scheme of using reg ex to parse the observables. The wc_model_gen generator is able to convert this to the wc_lang Observables with no issue.

However, it may be helpful to provide the same underlying implementation for each to allow code reuse across the repos.