Fast Simple Parallel Gzip NCD Calculation

[BAW2501]

Refactored code to improve performance and readability

• Using the joblib.Parallel library to parallelize the computation of the NCD matrix.
• Simpler logic for NCD calculation
• Removing unnecessary comments and improving the formatting of the code.
• tested code speed on 4 core machine

time: 8.31 s
vs
time: 39 s for video non Parallel code
vs
time: 16.3 s for video Parallel code

would love to see it validated using the 10k data