- Replaced old AppCont_ContMatrices.hxx/.cxx public interface with internal namespace-based .pxx header structure
- Split legacy matrix data into separate internal headers (BB, InvM, IBP, IBT, VB) for better organization
- Fixed out-of-bounds read in IBPMatrix for classe=26 by adding 3 missing data entries
- Added comprehensive GTest suite with 9 tests covering all matrix functions and their mathematical properties
