Add flutter-lints Dependency

[Neha62-lit]

Is your feature request related to a problem? Please describe.
Yes, In issue no #1 there is need of flutter-lint dependency, because we need to test our app using GitHub Actions.
Github Actions help us to automate our software development workflows in the same place we store code and collaborate on pull requests and issues. The speed of Github Actions is good, and its pricing is better than that of Travis.

Describe the solution you'd like
Linting is the process of analyzing a source code for any programming error, stylistic errors or any bug that can occur in the code. It is helpful, if you are working in a team, that way the whole team will follow some specific rules in the codebase. It's also helpful in identifying some common and uncommon mistakes that are made during coding like logical errors, unused variables etc.

Additional context
This is the package i propose to use here,
https://pub.dev/packages/flutter_lints

[Neha62-lit]

Hey @OverPoweredDev, Please assign this issue to me because for completing issue #1, I have to complete this issue first.

[OverPoweredDev]

Sure, no problem! I've been meaning to get CI/CD stuff up for a long time, I just get super distracted with new features 😅

It'd be awesome if you could set linting and all up though, thanks! I'll put in the labels too so it counts

[OverPoweredDev]

I've merged the PR, good work on that! I'll close the issue once it's integrated with Github Actions

You can do it if you want, or leave it as is

[Neha62-lit]

Okay