Foundation Classes, math_Matrix - Remove redundant checks and inline methods (#814)

Foundation Classes, math_Matrix - Remove redundant checks and inline methods (#814)

- Eliminated redundant member variables (`LowerRowIndex`, `UpperRowIndex`, `LowerColIndex`, `UpperColIndex`) that duplicated information already tracked by the underlying `math_DoubleTab Array`
- Inlined most `math_Matrix` methods into the `.lxx` file for better performance
- Updated all access patterns to use the `Array` member's methods directly
- Added `noexcept` qualifiers to non-throwing methods
- Modernized operator implementations (e.g., `operator-()` now returns `const`)