Matrix inverse (experimental)

::

 inv_minor(DM A) -> DM
 inv_minor(SX A) -> SX
 inv_minor(MX A) -> MX

Extra doc: https://github.com/casadi/casadi/wiki/L_1by

Doc source: https://github.com/casadi/casadi/blob/develop/casadi/core/generic_matrix.hpp#L493

Implementation: https://github.com/casadi/casadi/blob/develop/casadi/core/generic_matrix.hpp#L493-L493

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