Add updated architecture diagram

[Sukh-P]

Pull Request

Description

Adding an updated OCF architecture diagram with more granularity than the previous version (previous version kept in for posterity and a higher level overview)

Checklist:

• [ ] My code follows OCF's coding style guidelines
• [ ] I have performed a self-review of my own code
• [X] I have made corresponding changes to the documentation
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] I have checked my code and corrected any misspellings