documentation on ESlint setup

[subhangi2731]

Related Issuse

• documentation on ESlint setup and making the code prettier and linting the code

Closes: #219

Describe the changes you've made

Made documentation on ESlint setup and making the code prettier and linting the code

Checklist:

• [x] My code follows the style guidelines of this project.
• [x] I have performed a self-review of my own code.
• [x] I have commented my code, particularly in hard-to-understand areas.
• [x] I have made corresponding changes to the documentation.
• [x] My changes generate no new warnings.

[subhangi2731]

@khannakshat7 please merge my pr

[subhangi2731]

@khannakshat7 please merge my pr