add GUI in todo list with task priority feature

[Devparihar5]

Type of change

• Added new project
• Bug fix
• New features
• Enhanced documentation

Changes proposed in this pull request

• Project name: ToDoList

• Short description: add GUI with the Prioritize tasks with different colors (High priority in red, Medium in orange, Low in green) and Set due dates for tasks and select them from a calendar view

Checklist

• The code is Python 3 compatible
• I have added relevant comments in my file to make the code understandable
• I have added my project to a folder that includes all the necessary files

[github-actions]

Greetings! This is an automated message from GitHub Actions. 🤖
Your pull request has been received and is awaiting for a review by the repository owner or a maintainer. This may take some time, so please be patient.
While you wait, you can continue to work on other issues or pull requests, or explore the project further. Or you can simply relax and enjoy your day.
Thank you for your contribution to this project! You are awesome! ⭐

[Mrinank-Bhowmick]

Resolve conflicts