🚀 Feature: New type type guard: isIntrinsicType

[JoshuaKGoldberg]

Bug Report Checklist

• I have tried restarting my IDE and the issue persists.
• I have pulled the latest main branch of the repository.
• I have searched for related issues and found none that matched my issue.

Overview

From typescript-eslint/typescript-eslint#6240 (comment):

Yeah, we could do.

TypeScript internally declares IntrinsicType like so:

interface IntrinsicType extends Type {
    intrinsicName: string;
    objectFlags: ObjectFlags;
}

We can also support the more generic case of if a type is any IntrinsicType (rather than a specific one) by checking (type.objectFlags & ts.TypeFlags.Intrinsic) !== 0.

Let's add this type guard in! 🚀

Additional Info

No response