Treat number of Tx and Rx antennas and coherence time as constants
and infer lattice parameters from them

Support both complex and real matrices,
allow basis elements to be non-square matrices and vectors

Fix normalization of basis elements

See merge request pitkanm10/learning-to-communicate-optimally!2

Normalize such that generator matrix has determinant one

Parse Planewalker output for the max codeword energy, use it in codebook generation to exclude unnecessary codewords

Fix codebook generation and q-PAM signalling set, create codebook using a Python generator to not get memory overlows with big codebooks

Delete all output, add comparison of NN to theoretical performance boundaries, add also some equations to this monster commit

Backpropagate policy loss also through critic, move critic update after policy not to mess things up

Estimate covariance matrix separately for all lattice matrices (real and imag parts also separately)