Added a solution to Question 42 of Leetcode

[ZahraShahid]

This is a template on how to fill out a PR properly.

Description

An algorithm to remove the nth Node from the end of the linked list.

• Language Used: C++
• Approach Used: Counting the length
• Question(s) Solved: 42
• Issue(s) Closes: [FEATURE]: Add solution to Q41 to Q50 of Leetcode #24

This algorithm uses the curr pointer to loop over the LinkedList and store its total length in a variable.
If the node required to remove resides at the end of the list, it's removed and head pointer is returned.
Else, the curr pointer loops over the list again for the (length-requiredNodeNumberfromLast) to remove the desired Node

Closes #24

Related Issue

Acceptance Criteria

Type of Changes

	Type
	🐛 Bug fix
	✨ New feature
	🔨 Refactoring
	💯 Add tests
	🔗 Update dependencies
	📜 Docs

Testing Steps / QA Criteria

[DugarRishab]

Good work @ZahraShahid