Added API schema and documentation

[Sachin-chaurasiya]

Describe your changes :

I worked on the API documentation and schema because it is mandatory to have good documentation of An API.

Type of change :

• New feature

Preview (Screenshots) :

Checklist:

• I have read the Code Of Conduct document.
• I have read the CONTRIBUTING document.
• I have performed a self-review of my own.
• I have tagged my reviewers below.
• I have commented my code, particularly in hard-to-understand areas.
• My changes generate no new warnings.
• I have added tests that prove my fix is effective or that my feature works.
• All new and existing tests passed.

Reviewers

Documentation: @MidouWebDev, @abhivemp

[MidouWebDev]

@abhivemp i reviewed the requirements.txt, please review the other files (.py)

[abhivemp]

@Sachin-chaurasiya thanks for your PR! I'll pull your branch and get back to you.
@MidouWebDev sounds good mate

[MidouWebDev]

@abhivemp great !
Thanks