Added MyQueue and MyHashMap solutions

[PritPanchani]

No description provided.

[super30admin]

Strengths:

• The solution for MyQueue is correct and efficient.
• The code is clean and easy to understand.
• The comments and approach description are helpful.

Areas for Improvement:

• The submission includes an unrelated solution for MyHashMap. In the future, ensure that only the required solution is submitted for the specific problem. This helps in avoiding confusion and keeps the focus on the problem at hand.
• Although not necessary, consider adding null checks or handling edge cases explicitly, but the current implementation already handles them correctly.