matrix_to_json library

1. ml_linalg package
2. documentation
3. matrix_to_json.dart

ml_linalg package

1. Libraries
2. axis
3. decomposition
4. distance
5. distance_type_to_json
6. dtype
7. dtype_to_json
8. from_distance_type_json
9. from_dtype_json
10. from_matrix_json
11. from_vector_json
12. inverse
13. linalg
14. matrix
15. matrix_norm
16. matrix_to_json
17. norm
18. sort_direction
19. vector
20. vector_to_json