Resources: DSA resources added

[GAVINESHWAR]

Pull Request

issue : #1416

Description

Please include a summary of the changes and the related issue.
The Dsa resources like Youtube channel, playlists and coding platforms were added

Closes #

Type of change

• [X] Adding a new Resource
• [ ] Adding a new Category
• [ ] Documentation enhancement or fixes
• [ ] Website enhancement or fixes

Checklist:

• [X] I read carefully CONTRIBUTING.md
• [X] I have performed a self-review of my own code
• [X] I have commented my code, particularly in hard-to-understand areas
• [X] I have made corresponding changes to the documentation

Screenshots (if appropriate):

Please add screenshots to help explain your changes.

Additional

previous PR was closed due to conflicts. I have created a new PR to incorporate the required changes. @jfmartinz, please review the changes and merge them to contribute to the project.

Thank you