Add import type and export type support to TypeScript (#11171)

* Add support for type only imports in TS (#11053)
* Implement "export type {}" (#11122)
* Add "exportKind: type" when needed with TS (#11157)
* Add `onlyRemoveTypeImports` option to `transform-typescript` (#11173)
* Add onlyRemoveTypeImports to preset-typescript (#11179)

Co-authored-by: Brian Ng <bng412@gmail.com>
Co-authored-by: Raja Sekar <rajasekarm.dev@gmail.com>
Co-authored-by: Nicolò Ribaudo <nicolo.ribaudo@gmail.com>
Co-authored-by: Kai Cataldo <kai@kaicataldo.com>
Co-authored-by: Huáng Jùnliàng <jlhwung@gmail.com>
Co-authored-by: Henry Zhu <smiley.we@gmail.com>
Co-authored-by: Siddhant N Trivedi <sidntrivedi012@gmail.com>

packages/babel-types/src/definitions/es2015.js

@@ -382,7 +382,8 @@ defineType("ImportDeclaration", {
       validate: assertNodeType("StringLiteral"),
     },
     importKind: {
-      // Handle Flowtype's extension "import {typeof foo} from"
+      // Handle TypeScript/Flowtype's extension "import type foo from"
+      // TypeScript doesn't support typeof
       validate: assertOneOf("type", "typeof", "value"),
       optional: true,
     },