Update simple-resource example to use non-deprecated read_resource return type

[pja-ant]

Returning str | bytes from read_resource functions is deprecated. Updating this example to use Iterable[ReadResourceContents].

🤖 Generated with Claude Code

Motivation and Context

Examples should use the preferred APIs to set a good example and help users understand how to use the APIs. See e.g. #1320

How Has This Been Tested?

npx -y @modelcontextprotocol/inspector uv run mcp-simple-resource

Fetched all resources via inspector.

Breaking Changes

N/A

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update

Checklist

• I have read the MCP Documentation
• My code follows the repository's style guidelines
• New and existing tests pass locally
• I have added appropriate error handling
• I have added or updated documentation as needed

Additional context

N/A

[ihrpr]

Thank you!

This example is low-level server, maybe worth updating it to highlevel (fastmcp which will be renamed)

[pja-ant]

Thank you!

This example is low-level server, maybe worth updating it to highlevel (fastmcp which will be renamed)

It seems that samples are currently split into examples/fastmcp for FastMCP samples and examples/server for low-level server samples, so it seems intentional that this is using the low-level server? Happy to make the change, but seems intentional that it is this way?