[FIX] Implemented 1000x faster preallocation
[FIX] Partial cleanup of fast preallocation up till opDFT2 including opSpot and lsqrdivide
[FIX] Fixed opDiag multiply from spdiags to dyna-prealloc for loop
[FIX] Replaced zeros preallocation with dynamic preallocation from opDiag up till opHadamard
[FIX] fixed dyna-prealloc for all spot operators
[MERGE] Fixed opMask merge conflict