refactor: fix the return format of CallToolResult#68

TheEterna wants to merge 4 commits intospring-ai-community:0.5.xspring-ai-community/mcp-annotations:0.5.xfrom

TheEterna:refactor/issue-67-Update-the-AbstractMcpToolMethodCallback.convertValueToCallToolResultTheEterna/mcp-annotations:refactor/issue-67-Update-the-AbstractMcpToolMethodCallback.convertValueToCallToolResultCopy head branch name to clipboard