Refactor: adding flutter linter rules

[dk-a-dev]

Description:

The addition of linter rules to our Flutter project to ensure code quality and maintainability. Linter rules can help us catch potential issues early in the development process and maintain a consistent coding style.

Tips for the issue:

• Research and identify a set of Flutter-specific linting rules that align with best practices and our project's goals.
• Configure the selected linter rules in our project, ensuring they are compatible with our current codebase.
• Improve the overall code quality and maintainability of our Flutter project.

To do:

• [ ] Ask us to assign the issue
• [ ] Once the issue is assigned, you can start working on it
• [ ] Create a PR

Resources:

• dart/linter-rules
• package/flutter-lints

Note:

The task is assigned to contributors on a first-come, first-serve basis, and the contributor has to report progress every 3 days to ensure active development on the tasks.

[RitwikSingh28]

@dk-a-dev Please assign this issue to me.

[dk-a-dev]

@RitwikSingh28 ye sure it's assigned, please stick to the note mentioned