Add normalize parameter to gauxc_basisset_new_from_shells

[franzpoeschel]

This is the C function bound to Fortran here. Leaving the normalize param unspecified here seems like undefined behavior.

/**
 * @brief Create a new BasisSet instance from arrays of shells.
 * @param status Status object to capture any errors.
 * @param shells Pointer to an array of GauXCShell.
 * @param nshells Number of shells in the array.
 * @param normalize Whether to normalize the basis functions.
 * @return Handle to the created BasisSet.
 */
extern GauXCBasisSet gauxc_basisset_new_from_shells(
   GauXCStatus* status,
   GauXCShell* shells,
   size_t nshells,
   bool normalize
);

[awvwgk]

Thanks for the feedback, implemented in #174 and added to the skala branch.