Added Python pattern solutions

[kiranb1301]

This PR introduces Python implementations for the pattern problems in the DSA series.

• Mirrors Java versions in Python for better accessibility.
• Organized under /PythonPatterns/PatternPart1/ and /PythonPatterns/PatternPart2/.
• Code is clean, modular, and easy to extend.

Usage

1. Navigate to the Python solutions folder:

     cd /PythonPatterns/PatternPart1/
     cd /PythonPatterns/PatternPart2/

2. Run any pattern file using Python 3:

     python HalfPyramid.py

3. Output:

      Enter number : 5
      1
      12
      123
      1234
      12345