Add `duplicate_underscore_argument`

[0xLucqs]

What it does

Checks for function arguments having the similar names differing by an underscore.

Why is this bad?

It affects code readability.

Example

fn foo(a: i32, _a: i32) {}

Use instead:

fn foo(a: i32, _b: i32) {}

https://rust-lang.github.io/rust-clippy/master/index.html#/duplicate_underscore_argument

[stevencartavia]

Hi, can I take this?

[0xLucqs]

sure can you join the telegram group as well so i can help if you're stuck or don't know how to start ? https://t.me/cairolint