[DOCS] Add contributions.md

[Aadarsh805]

Description

Add contributions.md

Screenshots

No response

Additional information

No response

[munnokd]

Can I add this file? Please assign this issue to me.

[Aadarsh805]

Can I add this file? Please assign this issue to me.

Hey, yeah go ahead @munnokd, assigned you

[munnokd]

I solved this issue and review my pull request. If any changes should be there let me know I will improve it.