[typescript-axios]: withSeparateModelsAndApi handles importFileExtension

[izorg]

Separate models are located in modelPackage folder with index.ts file. ESM requires an index file with the provided extension when importFileExtension is defined.

Config:

additionalProperties:
  apiPackage: api
  importFileExtension: .js
  modelPackage: models
  withSeparateModelsAndApi: true
generatorName: typescript-axios

Output structure:

/
├── api
├── models
│   └── index.ts
├── api.ts
├── configuration.ts
└── index.ts

Current output of /index.ts:

export * from "./api.js";
export * from "./configuration.js";
export * from "./models.js";

Fixed /index.ts by PR:

export * from "./api.js";
export * from "./configuration.js";
export * from "./models/index.js";

If importFileExtension is not provided no changes are applied.

@TiFu @taxpon @sebastianhaas @kenisteward @Vrolijkx @macjohnny @topce @akehir @petejohansonxo @amakhrov @davidgamero @mkusaka @joscha

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[macjohnny]

thanks for the fix!