Add TensorError enum and Tensor struct with basic implementation

[CodeVoyager15]

Summary

• Introduced TensorError enum to handle tensor-related errors, including ShapeMismatch, InvalidType, UnsafeOperation, and a generic Other variant.
• Implemented fmt::Display and Error traits for TensorError to provide user-friendly error messages.
• Added a Tensor struct with data and shape fields to represent a tensor.
• Created a new method for the Tensor struct to initialize tensors with error handling.

[coolguy525]

Don't remove this test case.