[all] Migrate from deprecated pedantic to flutter_lints

[juliansteenbakker]

Proposal

Right now, all packages use pedantic. Pedantic however is discontinued. The Google team recommends using https://pub.dev/packages/flutter_lints for flutter packages. We should migrate all packages to this linter.

[adityathakurxd]

Can I work on this issue @mhadaily?
I am new to flutter_lints but look into it and migrate all packages to this linter.

[mhadaily]

It's all yours. @adityathakurxd

[thisisamank]

Hi @adityathakurxd are you currently working on this issue? I would like to assist :)

[adityathakurxd]

Hey @thisisamank, Yes I am working on the issue.
I yesterday setup the local environment. And, was looking into flutter_lints documentation. I'll make the PR soon.

[github-actions]

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