What is wrong

In the current state of the code, if you happen to try to inverse a matrix which has its determinant value equal to zero, the inverse_matrix function will return NULL, which can cause a segmentation fault when solving the program's equations.

How to reproduce:

t_object    *object = create_sphere();

set_object_transformation(object, shearing_matrix((t_shearing){1, 1, 1, 1, 1, 1}));

Setting this shearing transformation to object will return NULL to its object->inverse_transformation property. When this property is used in an operation, per se, in ray transformation, it will segfault.

How to fix:

We can either

1. return an identity matrix if we find an zero-determinant matrix while trying to inverse it, or we can
2. make so that our main data structure is a singleton, so whenever we find a flaw in our transformations, we can call that singleton and clear its memory, exiting the program gracefully.

parser.c don't protect cases where L, C or A are wrong:
Example: Cava, Linho will be read as Camera and Light.
Solution: the use of ft_strcmp and change typedef to "L" instead 'L'