Models need the ability to be persisted beyond just being in-memory. Add EF-enabled models to all libraries.

**Is your feature request related to a problem? Please describe.**
Models need the ability to be persisted beyond in-memory

**Describe the solution you'd like**
Add EF capabilities to kiota models

**Describe alternatives you've considered**
None, this has to be done via code

**Additional context**
n/a
