Dijkstras shortest path algorithm

[Simran1604]

Is your feature request related to a problem? Please describe.
Add Dijkstras shortest path algorithm in Graphs.

Describe the solution you'd like
I would like to add the algorithm and code for Dijkstras shortest path.

Describe alternatives you've considered
I would try to give a proper algorithm with the code else just the code with sample outputs with proper comments for easy understanding.

Additional context
Please assign this issue to me. I'd like to contribute to it. Thanks.