Create daily coding problem exercise framework

Develop a structured approach for implementing solutions to daily coding problems:

## Tasks:
1. Create a template for daily coding problems
2. Set up directory structure for categorizing problems
3. Implement testing framework for validating solutions
4. Add documentation template for problem statements and solutions
5. Create a workflow for adding new problems

## Benefits:
- Provides a consistent format for problem solutions
- Helps track progress through different problem types
- Ensures all solutions are properly tested
- Creates a repository of well-documented solutions

This framework will serve as the foundation for implementing specific daily coding problems from platforms like LeetCode, HackerRank, and others.