feat: add support for meta parameter in listTools

[smohite04]

Add support for meta parameter in listTools method.

Motivation and Context

McpSchema.PaginatedRequest now has a meta field (added in #344), but the client API methods don't expose it. As a result, servers which can accept the meta parameter in list tools cannot be used with java client. The Python SDK already supports passing _meta in tools/list requests:

python
async def list_tools(self, *, cursor=None, meta=None) -> ListToolsResult

This change aligns the Java SDK with the Python SDK and the MCP spec which allows _meta in PaginatedRequestParams.

How Has This Been Tested?

• Unit tests: McpAsyncClientTests.testListToolsWithCursorAndMeta() and testSyncListToolsWithCursorAndMeta() - verify _meta is correctly serialized in the JSON-RPC request
• Integration test: AbstractMcpSyncClientTests.testListToolsWithMeta() - verified against the real server-everything MCP server via HttpClientStreamableHttpSyncClientTests (Docker/Testcontainers).

Ran per recommendations

Unit tests (McpAsyncClientTests):
Tests run: 7, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.467 s
  testListToolsWithCursorAndMeta    -- Time elapsed: 0.031 s  ✅
  testSyncListToolsWithCursorAndMeta -- Time elapsed: 0.006 s  ✅
  testListToolsWithEmptyCursor      -- Time elapsed: 0.360 s  ✅
  (+ 4 existing tests passing)
BUILD SUCCESS


Integration test (HttpClientStreamableHttpSyncClientTests against real 
server-everything via Docker):
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 13.59 s
  testListToolsWithMeta -- Time elapsed: 0.445 s  ✅
BUILD SUCCESS

Breaking Changes

None. New overloaded methods added; existing listTools(String cursor) behavior unchanged.

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

Closes #907