UML Diagram in README.md

[habeeba-naaz]

Description

Please review and let me know any changes to be done.
Please include a summary of the change and which issue is fixed.
Please also include relevant motivation and context.
List any dependencies that are required for this change.

Fixes #50

Type of change

Please delete options that are not relevant.

• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• Any dependent changes have been merged and published in downstream modules

Reviewer: Vinit Shahdeo

[habeeba-naaz]

[PragatiVerma18]

Please follow proper markdown for adding an image. Rest all looks good in the image.

[habeeba-naaz]

Please share example to do that

[PragatiVerma18]

See these examples and try to correct it:

• https://ardalis.com/add-images-easily-to-github
• https://github.com/RWTH-EBC/AixLib/wiki/How-to:-Add-images-to-the-Wiki

[PragatiVerma18]

@habeeba-naaz since UML diagram is a part of the documentation, please make a PR to feature/documentation branch.

[nandikajain]

@habeeba-naaz ??

[harshita19244]

@habeeba-naaz please make pr to feature/documentation