Changes to Create a response

added the new optional request property task_budget

the tools/items request property type changed from object to no type

added the new optional request property context_management

added the new optional request property skills

the request property tools became nullable

added FileSearchTool WebSearchPreviewTool WebSearchPreview20250311Tool WebSearchTool WebSearch20250826Tool ShellTool McpTool ToolSearchTool FunctionTool to the tools/items request property oneOf list

added the new optional request property frequency_penalty

added the new optional request property presence_penalty

added the new optional request property sovereignty_requirements