Add Coin Change Dynamic Programming Algorithm with Doctests and Type Hints

[MJ-thunder]

Description

This PR adds the Coin Change Dynamic Programming algorithm implementation.

• Implemented bottom-up dynamic programming approach.
• Added type hints for better readability and maintainability.
• Included doctests to ensure correctness and adherence to TheAlgorithms' testing standards.
• Cleaned redundant files (duplicate knapsack.py already existed).

Checklist

• I have read the Contributing Guidelines
• This pull request adds a new algorithm or improves an existing one
• The code follows the project’s PEP8 style guidelines
• I have added or updated doctests
• I have added type hints
• I have tested the code using pytest or by running doctests

[cclauss]

Closing tests_are_failing PRs to prepare for Hacktoberfest