adding the Leetcode heatmap or codeforce heatmap and scoresheet

adding the Leetcode heatmap or codeforce heatmap and scoresheet of leetcode 

<img width="640" height="385" alt="Image" src="https://github.com/user-attachments/assets/9e88ee7b-4a1b-4f9e-bab0-4db2ecee78cd" />