docs: enhance README with table of contents, installation guide, and features section

- Add comprehensive table of contents for easy navigation
- Include detailed installation steps with virtual environment setup
- Add usage examples showing how to run and import algorithms
- Create features section listing all algorithm categories
- Add explicit license section with MIT License information
- Expand contributing section with quick start guide
- Add about section explaining repository purpose

Fixes #13111

Author: devvrat8848

README.md

@@ -91,10 +91,10 @@ All implementations include:
 2. **Set up a virtual environment (recommended)**
    ```bash
    python -m venv venv
-   
+
    # On Windows
    venv\Scripts\activate
-   
+
    # On macOS/Linux
    source venv/bin/activate
    ```