[WIP] Bs feature branch

[bshmu]

Pull Request type

Please check the type of change your PR introduces:

• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no API changes)
• Build-related changes
• Documentation content changes
• Other (please describe):

What is the current behavior?

Issue Number: N/A

What is the new behavior?

Adds a directory within operators to hold all MutMatrix related logic.

MutMatrix is updated with to_tensor() and from_tensor() methods to call tensor objects methods on the MutMatrix object. Some tensor methods (e.g. reshape, transpose, matmul, reduce_sum) are added to MutMatrix implementation.

Two new traits/impls for MutMatrix are added:

1. MatrixLinalgTrait: logic for solving 2D systems of equations. Replicates np.linalg.solve().
2. MatrixStatisticsTrait: mean, weighted mean, covariance, weighted covariance, and exponential weights functions added. Replicates numpy.average() and numpy.covariance().

Tests are added and all imports using MutMatrix (e.g. TreeEnsembleClassifier) are updated accordingly.

Does this introduce a breaking change?

• Yes
• No

[raphaelDkhn]

Hi @bshmu, thanks for your PR!
Some things are missing to make the PR valid.
Please follow this step-by-step tutorial, to see how to implement operators in Orion:
https://orion.gizatech.xyz/academy/tutorials/implement-new-operators-in-orion