Lint that package names only use `_` / only use `-`

[epage]

What it does

Mutually exclusive (restriction) lints to ensure package.name have consistent names

I'm suggesting we add both as we are not currently opinionated on this

Advantage

Help ensure consistency throughout a project

Drawbacks

No response

Example

[package]
name = "foo-bar"

Could be written as:

[package]
name = "foo_bar"

[ofluffydev]

I think you opened this twice on accident Status: Open. #15584

[epage]

That one is for feature names while this is for package names.