[BUG] Interface is typed as enum instead of string for type string with enum in typescript-nestjs

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• Have you tested with the latest master to confirm the issue still exists?
• Have you searched for related issues/PRs?
• What's the actual output vs expected output?
• [Optional] Sponsorship to speed up the bug fix or feature request (example)

Description

I am using the openapi-cli tool to generate client code for typescript-nestjs application. But I have an issues with the typing of enums. They seem to be defined as string but the generated code types them as enum. Might not be a bug, but rather my lack of knowledge.

openapi-generator version

7.10.0

OpenAPI declaration file content or url

Link to file

geometry:
          type: object
          properties:
            type:
              type: string
              enum:
                - Point
                - Multipoint
                - Polygon

Generation Details

openapi-generator-cli generate -g typescript-nestjs -i assets/swagger.yml -o --skip-validate-spec

i had to use --skip-validate-spec, because there are some issues on the swagger definition. It's not mine it's a decleration file i got.

Steps to reproduce

use above commands to generate a client -> type of enum is declared as enum instead of string

Start with the OpenAPI declaration in the linked Pastebin content and assets/swagger.yml, then run the shown openapi-generator-cli command with the typescript-nestjs generator. Compare the generated type for geometry.type with the declared string enum and determine the expected output before checking the relevant generator templates or tests.