[Server] implement PSR-16 cache based session storage

[lvluoyue]

Added a new PSR-16 compliant cache-based session store implementation that allows using any PSR-16 compatible cache as the backend for session data storage.

Motivation and Context

This change addresses the need for flexible session storage solutions by implementing the SessionStoreInterface using PSR-16 standard cache. It provides developers with the ability to use Redis, Memcached, or other PSR-16 compliant cache systems for storing session data, offering more flexibility than file-based storage.

How Has This Been Tested?

Tested with Symfony Cache component's Redis implementation. All session operations function correctly with proper exception handling and key prefixing.

Breaking Changes

No breaking changes. This is a completely new feature implementation that does not affect existing code.

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

[chr-hertel]

It should still be an optional dependency - you might not need it when using the sdk

[chr-hertel]

Thanks @lvluoyue for working on this - please see my comments and think about adding documentation as well 👍

[lvluoyue]

Thanks @lvluoyue for working on this - please see my comments and think about adding documentation as well 👍

hi @chr-hertel , I have added the documentation as requested. Please review the code

[chr-hertel]

Thank you @lvluoyue!