feat: add chat data to authorization model

[tessstoddard]

Summary of Changes

Adds chat_data to authorization model. Spec changes https://developer.mx.com/drafts/mdx/authorization/index.html#chat-data

Fixes # https://mxcom.atlassian.net/browse/GCU-1192

Public API Additions/Changes

Adds a new object to Authorization

How Has This Been Tested?

Tested locally by pulling into a connector

{
  "authorization": {
    "chat_data": {
      "authorized_at": 1770669225488,
      "auth_user_id": "1234",
      "email": "test@test.com",
      "first_name": "first",
      "last_name": "last",
      "member_id": "56788",
      "username": "username"
    },
    "type": "CHAT",
    "user_id": "U-00u3m19f6ynFXX0Jz1d7"
  }
}

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works