Matrix class Unit tests

This for tracking all of the features of the language being tested.

- [X] Constructors
- [ ] = operator
- [X] standard
- [X] empty args
- [X] vector intializer

- [x] Operators
- [x] Arithematic
- [x] Comparison
- [x] Boolean
- [x] Inplace Arithematic

- [ ] Determinant Tests Int & Doubles
- [X] 2x2
- [X] 3x3
- [X] 4x4

- [ ] Gaussian Elimination Int & Double
- [ ] 2x2
- [ ] 3x3
- [ ] 4x4

- [ ] Linear Equation Solvers
- [ ] 1 var
- [ ] 2 vars
- [ ] 3 vars
- [ ] 4 vars

- [ ] Adjugate Int & Double
- [ ] 2x2
- [ ] 3x3
- [ ] 4x4

- [ ] Inverse Modulus
- [ ] Int
- [ ] Double

- [ ] Cofactors

The issue is a checklist for implementing unit tests for a Matrix class in C++. Start by examining the existing test files or the Matrix class implementation to understand the current test structure. Focus on one unchecked item, like 'Gaussian Elimination Int & Double' for a 2x2 matrix. Write a test case in the appropriate test suite, verify it compiles, and run the existing test runner to ensure the new test passes.

由索引模型根据 Issue 内容生成。