Revision 2025-03-26 (without streamable http)

[4t145]

1. Suppot revision 2025-03-26 data types
2. Support meta, progress tokne, and extensions in request/notification,
3. Remove Message, use JsonRpcMessage directly

Motivation and Context

Support revision 2025-03-26

How Has This Been Tested?

Breaking Changes

1. Add new types and fields to satisfy the revision 2025-03-26
2. Now PaginationParam is the previous PaginationParamInner

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 introduces support for the 2025-03-26 revision by updating message types, API signatures, and protocol version handling while removing the legacy Message type in favor of JsonRpcMessage. Key changes include:

• Changing pagination parameters to be optional (Option) across various endpoints.
• Adding support for meta fields, progress tokens, and extensions in request/notification structures.
• Updating protocol version constants and ordering, adding new types (e.g. RawAudioContent) and tool annotations.

Reviewed Changes

Copilot reviewed 16 out of 16 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
examples/servers/src/common/counter.rs	Updated pagination parameter type for resource lists.
crates/rmcp/src/transport/sse_server.rs	Changed client message handling to use serde_json::Value with error handling.
crates/rmcp/src/service/server.rs	Revised initialization logic with protocol version negotiation and message type updates.
crates/rmcp/src/service/client.rs	Modified API calls to support optional pagination parameters and added default extensions.
crates/rmcp/src/service.rs	Introduced a progress token provider and updated peer request handling.
crates/rmcp/src/model/tool.rs	Added an optional annotations field to the Tool structure.
crates/rmcp/src/model/serde_impl.rs	Updated serialization/deserialization to integrate meta and extension support.
crates/rmcp/src/model/meta.rs & extension.rs	New modules for meta information and protocol extensions support.
crates/rmcp/src/model/content.rs	Added RawAudioContent for new audio support.
crates/rmcp/src/model/capabilities.rs	Extended ServerCapabilities to include completions and updated builder types.
crates/rmcp/src/model.rs	Updated protocol version constants, revised pagination types, and replaced Message with JsonRpcMessage.
crates/rmcp/src/handler/server/tool.rs & server.rs	Adjusted pagination parameter types in server handler functions.
crates/rmcp-macros/src/tool.rs	Made minor improvements to variable naming in tool macro code.

[4t145]

I would like to fix the ci lint message when merge.

[jokemanfire]

The amount of modification is quite large. Please give me more time to take a look

[4t145]

In China we are going to take a vacation for Qingming Festival these days, so the reply may not be so timely.

[4t145]

@jokemanfire @kalvinnchau I think this pr is ready for merge, could you please review this again?