Use different decomposition methods for Matrix Factorization

[ytann]

Implement matrix factorization using different decomposition techniques:

• - QR decomposition
• - LU Matrix Decomposition
• - Singular Value Decomposition
• - Cholesky Decomposition
  Cholesky requires square matrix and usually that's not the case.

Optimally choose the value of latent features.

[jaindhairyahere]

I'll do Cholesky Decomposition. I've studied that

[chinmay-jain767]

so do I have to create a new issue for QR decomposition

[ytann]

You can open a pull request based on your work. No need for another issue.

[shreyasirc]

I'll do LU Matrix Decomposition