[Blog] Add about Promises and Async/Await Functions in JavaScript

### Description

Promises and Async/Await is one of the most important parts If you want to learn to react and another framework and having a strong understanding of it is a really good thing.

### Published Link

_No response_

### 🔄️ Websites

Hashnode

### Checklist ✅

- [X] I checked and didn't find similar issue
- [X] I am from GSSoC23
- [X] I have read the [Contributing Guidelines](https://github.com/ZeroOctave/resource-gallery/blob/main/CONTRIBUTION.md)
- [X] I am willing to work on this issue (blank for no)