Introduce fully typed JS client

[vdusek]

• Based on the OpenAPI specification: https://docs.apify.com/api/openapi.json.
• For additional context, see:
  • related issue in the Python client - Introduce fully typed Python API client apify-client-python#481,
  • and the parent (epic) issue - https://github.com/apify/apify-core/issues/25186.