feat: add a to_schema parameter to services (#220)

* feat: services accept BaseModels and Structs

* fix: adds tests for converting struct and basemodel classes

* fix: correct configuration

* feat: tweak to_dict

* feat: add a `to_schema` parameter to services

* chore: linting

* fix: type checking

* feat: assert model

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Signed-off-by: Cody Fincher <[email protected]>

Author: cofin