eslint-plugin-tsdoc: Check types referenced through {@link} and {@inheritDoc}

[kraenhansen]

In its current form, the plugin doesn't supply a rule to check the types referenced from an inline link or inheritDoc tag.

This means that it's harder for maintainers of documentation to notice when these break due to a rename of some referenced type.

I suggest adding a new rule named check-types or valid-types (as a homage to eslint-plugin-jsdoc's rule of the same name) which would check that the type referenced is in scope of the comment.

Note: Enabling this rule, could potentially also mark the types as used and fix #348 too.

I'd be interested in submitting a PR for this, if this is interesting for the maintainers.