Added tutorial for creating REST API with Python and FastAPI.

[amulyavarshney]

Please fill in this pull request template before submitting

1. This pull request resolves #107

2. Description

I have created an advanced tutorial for creating REST API using Python and FastAPI. The prerequisite for this tutorial is mentioned in the local README.md file.

3. Fill in checklist by marking [x]

• [x] I've read the CONTRIBUTING.md
• [x] I was assigned to this issue
• [x] My code is formatted using required linting
• [x] I've run my code locally and checked it works

[amulyavarshney]

The job-execute-python check is unable to install the dependencies from requirements.txt file. Please fix that or rerun the program and check it manually.

[funbeedev]

@amulyavarshney Thanks for your PR! I'm adding the hacktoberfest accepted label so it counts in time for hacktoberfest. However, please note we might still require you to make some changes after we review the PR later on!

[funbeedev]

The job-execute-python check is unable to install the dependencies from requirements.txt file. Please fix that or rerun the program and check it manually.

I'll also check this later.