Update recursion concept documentation

[zynthatrix]

This commit introduces a comprehensive tutorial on recursion in JavaScript. The tutorial provides easy-to-understand examples and explanations for beginners, covering the fundamental concepts of recursion, including base cases, recursive cases, and the pros and cons of using recursion. The tutorial includes two illustrative examples: a countdown function and the calculation of the factorial of a number. Each example is accompanied by detailed explanations, making it accessible for those new to the concept of recursion. The markdown file is well-formatted for clarity and readability, following the style of existing documentation in the repository. Contributors: Zynthatrix

[github-actions]

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[kotp]

See forum discussion here, and also here.

[kotp]

It would not kill me if it (never) came in, but a couple of potential suggestions.

[zynthatrix]

Yeah thanks for those suggestions I applied them as they are more accurate.