Add methods for tree traversal - DFS/BFS

[extinctsion]

add new methods for tree traversal and CRUD operations.
C- Create new nodes at tree
R- Read data at particular node
U- Update data at particular given node
D- Delete particular node of the tree.

-- Add methods to create tree
-- Add methods for tree traversal
--BFS
--DFS

[Dv04]

Hey, can I get assigned to this issue?

[extinctsion]

@Dv04 issue assigned to you.

[Dv04]

Thanks. Will update you as soon as done.

[Harsha19-08]

can u asssign this issue?