Add more graph features

[dibyadas]

Like Dijkstra's, Prim's , Floyd-Warshall , BFS, DFS information can be added to this

[HariMahi]

Where to add the information about the Graphs like Dijkstra's, Prim's etc

[dibyadas]

@HariMahi Apologies for the late reply. Try running the code locally and get it up and running. After that, you can easily figure it out. Check out networkx docs for MST, DFS and BFS, etc. Ping here if you face problems figuring it out.