fix(cli): Fixed additionalProperties and recursive $ref resolution

[charlesbodman]

This PR fixes an issue with additionalProperties type generation

Input OpenAPI Schema:

"connectionPermissions": {
  "type": "object",
  "additionalProperties": {
    "type": "array",
    "items": {
      "type": "string",
      "enum": ["READ", "UPDATE"]
    }
  }
}

Before Fix

'connectionPermissions': Record<string, unknown>
// or in some cases
'connectionPermissions': { "type": unknown; "items": unknown; }

After Fix

'connectionPermissions': Record<string, Array<'READ' | 'UPDATE'>>

• Updated the getType function to use a while loop for resolving $ref references.
• Improved handling of additionalProperties to support recursive types and combined properties.
• Added tests for various scenarios including additionalProperties with recursive types and multi-level $ref resolution.
• Modified writeObjectProperties to handle additionalProperties more effectively, including cases for true and object types.
• Introduced new tests to validate the behavior of writeObjectProperties with complex schemas.

Closes #19