Chitra new tagline & short description

[aniketmaurya]

The current tagline of Chitra is Model Building to deployment and short description is chitra (चित्र) is a Deep Learning library for Model Building, Explainable AI, Data Visualization, API Building & Deployment.

Chitra started as a image utility library and now it has model serving and API building features. It make sense to promote chitra as a multi functional library.

Maybe - A multi functional library for full stack Deep Learning. Simplifies Model Building, API development and Model Deployment.

[aniketmaurya]

Deprecate- Model training and Dataloading in favour of [Gradsflow].