Added Rabin_karp Algorithm

[codingis4noobs2]

Description

Added Python Program -> Rabin-Karp Algorithm for Pattern Searching in data_structures/strings

Fixes # (issue)

Type of change

Please delete options that are not relevant.

• [x] New feature/question

Checklist:

• [x] My code follows the style guidelines of this project i.e. Pep8
• [x] I have performed a self-review of my own code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I have made corresponding changes to the documentation
• [x] Any dependent changes have been merged and published in downstream modules
• [x] I have squashed unnecessary commits