feature/filter issues by difficulty level

[Gprakhar141]

Description

I have implemented the functionality to filter the issues based on their difficulty level for users to select the issues they want to contribute in, hindering chances of confusion.

Related Issue

Fixes #167 Filter Issues by Difficulty Level for Easier Contribution

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Motivation and Context

This feature will allow contributors to pick issues aligned with their skill level, improving the overall efficiency of contributions.
It will reduce confusion for new contributors who may find it hard to choose the right issues to work on.

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

Screenshots (if appropriate):

Checklist:

• I have registered myself at Contrihub website.
• My code follows the code style of this project.
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• Any dependent changes have been merged and published in downstream modules
• I have added tests to cover my changes.
• All new and existing tests passed.

[meisabhishekpatel]

seems good