Add methods for graph search.

[extinctsion]

Implement graph search using different algorithms.

[Ayushlion8]

Hey, I want to work on this issue :)

[Zahid92]

Hi @extinctsion , I can add BFS - DFS as well as explaination for both. Could you assign me this issue?

[extinctsion]

Pls follow the structure and add trees and graph from different file in the same folder.
Graph.py -> methods.
Then import the file in main.py Or easypythonpi file

[Ayushlion8]

Hey @extinctsion, I have created PR of test_cases folder for graph_implementation as you said
Please review it:)

[extinctsion]

Can you follow the latest instruction