Add custom recipes listing API

[Dragons0458]

Context

Cookidoo exposes methods to fetch and manage individual custom recipes, but the client does not currently provide a way to retrieve the user's complete custom recipe list.

The custom recipe listing endpoint also returns recipe content in a slightly different shape from the individual recipe endpoint, so the existing parser needs to understand both representations.

Objective

The goal of this PR is to add a focused list_custom_recipes() API while preserving the behavior of the existing custom recipe methods.

What changed

List custom recipes

• Added list_custom_recipes() to retrieve all custom recipes from created-recipes/{language}.
• Added the custom recipe collection media type required by the listing endpoint.
• Routed the request through the shared _request_json helper so authorization failures, request errors, timeouts, malformed responses, and JSON parsing remain consistent with the rest of the client.
• Added response-shape validation before parsing the returned items.

List response parsing

• Added typed structures for the custom recipe list response and its text items.
• Updated the existing custom recipe parser to support the field names returned by the list endpoint:
  • numeric or ISO-8601 durations
  • tool or tools
  • recipeYield or yield
  • recipeIngredient or ingredients
  • recipeInstructions or instructions
• Normalized ingredient and instruction objects containing text into the existing list[str] public representation.
• Added safe zero defaults when optional times or yield data are missing.
• Kept the parser fully typed without introducing Any.

Tests

• Added unit tests for successful listing, empty lists, authorization failures, request exceptions, and malformed responses.
• Added parser coverage for the custom recipe list response format.
• Added a read-only smoke test against the real Cookidoo listing endpoint.

Behavioral notes

• This PR only adds custom recipe listing support. It does not add custom recipe creation or editing APIs.
• list_custom_recipes() returns list[CookidooCustomRecipe].
• Existing individual custom recipe methods retain their current behavior.
• The public CookidooCustomRecipe representation remains unchanged.

Validation

• .venv/bin/python -m pytest -q --cov-config=pyproject.toml --cov=cookidoo_api --cov-branch --cov-report=term-missing --cov-fail-under=100
  • 270 passed
  • statements: 849/849
  • branches: 112/112
  • total coverage: 100.00%
• .venv/bin/python -m pytest -q smoke_test/test_2_methods.py::TestMethods::test_cookidoo_list_custom_recipes
  • 1 passed against the real Cookidoo endpoint
• .venv/bin/python -m ruff check .
• .venv/bin/python -m mypy cookidoo_api

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (d7fd1fa) to head (d17ea88).

Additional details and impacted files

@@            Coverage Diff            @@
##            master      #222   +/-   ##
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  Coverage   100.00%   100.00%           
=========================================
  Files            7         7           
  Lines          833       849   +16     
  Branches        53        56    +3     
=========================================
+ Hits           833       849   +16     

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