Python: Add additional content types to match MEAI

[eavanvalkenburg]

MEAI added several new content types: dotnet/extensions#6964 and dotnet/extensions#6664 and dotnet/extensions#6749

Below the .Net versions are linked to make it easy to reference.

CodeInterpreterContent

• Adds new CodeInterpreterToolCallContent and CodeInterpreterToolResultContent types
• Updates the OpenAI Assistants and Responses ChatClient implementations to produce them

Update HostedFileContent

• Updates HostedFileContent with an optional MediaType and Name, matching the corresponding properties on DataContent and UriContent.

HostedMCP

• Adds content types for MCP tool calls and results (HostedMcpServerToolCallContent, HostedMcpServerToolResultContent) to work in conjuction with HostedMCPTool

Image Generation

• Adds HostedImageGenerationTool
• Adds ImageGenerationToolCallContent and ImageGenerationToolResultContent

Computer Use
TBD