feat: add get_template_content and get_user_recipes methods

[erikzimmermann]

Thanks @miaucl for the great work on this library. I am missing an export endpoint for the recipes though. So here it is.

Summary

• Adds get_template_content(content_uuid) to fetch full template details
  (including ingredients) from the /v2/bringtemplates/content/{uuid} endpoint
• Adds get_user_recipes() as a convenience method that combines
  get_inspirations("mine") with get_template_content to return fully
  populated templates for all user-saved recipes (ad/POST entries excluded)
• Merges summary-level metadata (name, image, link) into the detail response
  where the detail endpoint omits it
• Adds tests and snapshot fixtures for both methods

Note: existing tests are currently affected by an aioresponses/aiohttp 3.13+
incompatibility — a fix is pending upstream in pnuckowski/aioresponses.