This change adds support for complex union interfaces like the following:

import { MyType } from 'MyType';
import { MySecondType } from 'MySecondType';
type SuperType = { name: string } & (MyType | MySecondType);

const x: SuperType = {};

Expected result would be something like:

{
  "elements": [
    {
      "key": "name",
      "value": {
        "name": "string",
        "required": true,
      },
    },
    {
      "key": "a",
      "value": {
        "name": "number",
        "required": true,
      },
    },
    {
      "key": "b",
      "value": {
        "name": "string",
        "required": false,
      },
    },
  ],
  "name": "intersection",
  "raw": "{ name: string } & (MyType | MySecondType)",
}

I have added a test to address this, and i was fighting pretty hard with the existing types (chat gpt was a big help) - but i'm pretty sure there is room for improvement, help would be appreciated :)

TODOS

• Modify "handleTSIntersectionType" in "getTSType" to fully resolve all involved types
• Add new "handleTSParenthesizedType" to "getTSType" to fully resolve all involved types
• Add new test for "getTSType", "deep resolve intersection types"
• Get rid of "any" typings and stupid typeguards in "getTSType" i have added to "make it work"
• Support TS union types in "codeTypeHelper"
• Adjust existing test "does not support union proptypes" into "does support union proptypes"
• Add tests for the new utility "mergeTSIntersectionTypes"
• Add more test cases to make sure everything is working like we are used to with "react-docgen-typescript"
• Make sure all of this is also working with flow types
• Create changeset, this is definitely a new version

Fixes #914