[Typescript] Import path is invalid in windows.

Created by: masmgr

Fixes #7174 (closed). Please review.

Use / instead of File.Separator. File.Separator is / in Windows.

A target method is postProcessOperationsWithModels of openapi-generator\modules\openapi-generator\src\main\java\org\openapitools\codegen\languages\TypeScriptClientCodegen.java.

Before

im.put("filename", ((String) im.get("import")).replace(".", File.Separator));

After

im.put("filename", ((String) im.get("import")).replace(".", "/"));

By this, OpenAPI generator generated valid import path in typescript.

Expected Code

import { Pet } from '../models/Pet';

Actual Code

import { Pet } from '..\models\Pet';