Correct usage of Eigenvalue decomposition with ojAlgo

[clumsyspeedboat]

The current implementation uses Eigenvalue.Generalised<Double> generalisedEvD = Eigenvalue.R064.makeGeneralised(matrix); for eigenvalue decomposition, which is intended for generalised eigenvalue problems. To properly handle symmetric and non-symmetric matrices, update the code to use Eigenvalue.R064.make(matrix, symmetric) (with symmetric set appropriately).

Acceptance Criteria:

• Code no longer uses makeGeneralised(matrix) unless actually solving a generalised eigenproblem.
• Use Eigenvalue.R064.make(matrix, true) for symmetric matrices and Eigenvalue.R064.make(matrix, false) for non-symmetric matrices.
• Add relevant unit tests for both symmetric and non-symmetric cases.

Parent: #29