Diffusion

[lokeshmohanty]

New modules:

• diffusion
• training
• data (using grain)

New Examples:

• simple/digits_generator.py
• simple/toy_diffusion.ipynb

[lokeshmohanty]

TODO:

• add scientific equations and references for diffusion module
• add scientific equations and references for transformer module

[harshdeep-zenteiq-ai]

TODO:

• add scientific equations and references for diffusion module
• add scientific equations and references for transformer module

That would be great. Also, please give a thought about adding the toy examples or adding examples from SciML or Autonomous systems. Thank you @lokeshmohanty