feat(ai): remove assist action and add context fields

[innomaxx]

Closes #258

[Copilot]

Pull request overview

Updates the AI resource type system and tests to match recent Crowdin/Crowdin Enterprise API changes by removing the deprecated assist action and introducing new context/config fields for prompt configuration and prompt-completion requests.

Changes:

• Removed assist from AIPromptAction and removed the related settings patch path enum value.
• Updated AI prompt basic-mode typing to support projectContext (and organizationContext) and added new basic-mode config types for alignment and qa_check.
• Extended prompt-completion context resources to include projectDescription, and updated unit tests accordingly.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
crowdin_api/api_resources/ai/types.py	Removes assist-related types, adds alignment/qa_check config types and new context fields for AI prompt configs and completion resources.
crowdin_api/api_resources/ai/tests/test_ai_resources.py	Updates test fixtures and request-serialization expectations for new actions and added context fields; removes assist-related test cases.
crowdin_api/api_resources/ai/enums.py	Removes ASSIST action + assist settings patch path; adds ALIGNMENT and QA_CHECK actions.

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