feat: add title field for data types

[4t145]

Motivation and Context

to support the title field in lastest revision

How Has This Been Tested?

Breaking Changes

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

[Copilot]

Pull Request Overview

This PR adds a title field to various data types in the MCP (Model Context Protocol) implementation to support the latest revision of the protocol. The change introduces optional human-readable titles for tools, resources, prompts, and other entities.

• Adds optional title field to core data structures (Tool, Resource, Prompt, Implementation, etc.)
• Updates all instantiation sites to include title: None for backward compatibility
• Modifies macro generators to support the new title field

Reviewed Changes

Copilot reviewed 14 out of 14 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
crates/rmcp/src/model/tool.rs	Adds title field to Tool struct and updates constructor
crates/rmcp/src/model/resource.rs	Adds title field to RawResource and RawResourceTemplate structs
crates/rmcp/src/model/prompt.rs	Adds title field to Prompt and PromptArgument structs
crates/rmcp/src/model/content.rs	Updates RawContent enum variant and test instantiation
crates/rmcp/src/model.rs	Adds title field to Implementation and PromptReference structs
crates/rmcp-macros/src/tool.rs	Updates tool macro to support title attribute
crates/rmcp-macros/src/prompt.rs	Updates prompt macro to support title attribute
examples/servers/src/sampling_stdio.rs	Updates Tool instantiation with title field
examples/clients/src/streamable_http.rs	Updates Implementation instantiation with title field
examples/clients/src/sse.rs	Updates Implementation instantiation with title field
crates/rmcp/tests/test_elicitation.rs	Updates test implementations with title field
crates/rmcp/src/handler/server/prompt.rs	Updates PromptArgument instantiation with title field
crates/rmcp/tests/test_message_schema/*.json	Updates schema descriptions removing batch operations reference

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