feat: to navigate through videos by prev and next video button

[Prashant-flick]

PR Features:

• Added functionality to navigate through videos within a course using previous and next buttons.
• Automatically plays the next video in the course after the current video ends.

Limitations

• Navigation to the next course after the last video in the current course is not implemented.
• Navigation is limited to videos only, excluding notes.

https://github.com/user-attachments/assets/47436014-6c33-4714-ae3a-4eef288395d8

Resolves #1166

• Open to any suggestions for improvements; please let me know your thoughts in the comments.

Checklist before requesting a review

• [x] I have performed a self-review of my code
• [x] I assure there is no similar/duplicate pull request regarding same issue

[devsargam]

adding it to things to review

[Prashant-flick]

hey @devsargam your thoughts on this?

[devsargam]

This is great but I need to review for all edge cases

[devsargam]

Sorry this looks really good but considering this pr ref: https://github.com/code100x/cms/pull/1434