feat: Add WonderQ-MiniAPP Public API documentation

- Introduced a comprehensive API contract for the WonderQ-MiniAPP, detailing endpoints for site configuration, product listings, and lead submissions.
- Defined data types for various entities including HeroSlide, Destination, Theme, CtaBanner, PublicProduct, and more.
- Specified request and response formats, including error handling guidelines.

chore: Update requirements to include python-multipart

- Added python-multipart dependency to requirements.txt for handling file uploads.

test: Implement API contract tests

- Created test suite for API contracts, validating serializers and endpoints for public products and leads.
- Included tests for destination and product serializers, ensuring correct data handling and validation.

test: Add configuration tests for OSS settings

- Implemented tests to verify that OSS settings are correctly loaded from environment variables.

tests/test_config.py

@@ -0,0 +1,15 @@
+from app.config import Settings
+
+
+def test_oss_settings_are_loaded_from_prefixed_environment(monkeypatch):
+    monkeypatch.setenv("OSS_ACCESS_KEY_ID", "example-access-key-id")
+    monkeypatch.setenv("OSS_ACCESS_KEY_SECRET", "example-access-key-secret")
+    monkeypatch.setenv("OSS_ENDPOINT", "oss-cn-example.aliyuncs.com")
+    monkeypatch.setenv("OSS_BUCKET_NAME", "example-bucket")
+
+    settings = Settings(_env_file=None)
+
+    assert settings.oss_access_key_id == "example-access-key-id"
+    assert settings.oss_access_key_secret == "example-access-key-secret"
+    assert settings.oss_endpoint == "oss-cn-example.aliyuncs.com"
+    assert settings.oss_bucket_name == "example-bucket"