Consolidating LCS and LIS Algorithm Implementations into a Single File

[kxhitz]

Feature description

Hello

I would like to work on this issue and consolidate the algorithms for Longest Common Subsequence (LCS) and Longest Increasing Subsequence (LIS) into one file. Could you please assign this issue to me? I am excited to contribute and will ensure the file is well-organized with clear documentation for each method.

Thank you!