Add feature to show errors if methods/types do not implement interfaces mentioned in documentation

[ccarner]

Firstly, great plugin!

I was actually considering making a plugin myself to make it easier to deal with go's duck-typed interfaces when I found yours while researching :)
Yours is close to what I was looking for, but here's what I was initially hoping to have:

I want to use go's built in documentation links (square brackets in comments [], which are already parsed/highlighted in the golang VSCode extension so must be already understood by the plugin) to check/enforce implementation of interfaces.

EG:

// MyType implements [MyInterface] (see #1 below)
type MyType struct {}

type MyInterface interface {
   Foo()
}

// MyType implements [MyInterface] (see #2 below)
func (m *MyType) Foo() {...}

In this scenario, the plugin would:

1. throw an error (in the VScode errors panel) when a type has a comment //MyType implements [MyInterface] but it if it doesn't implement the interface
2. throw an error when a method on a receiver has a comment like //MyType implements [MyInterface], but the method being implemented is not a method in the mentioned interface. This will help catch if a method is renamed in the interface, or mistyped when implemented.

Any chance this is in scope??