refactor: reformat McpSchema.java and reorganize imports

[tzolov]

• Remove unused imports (CallToolResult, TextContent)
• Standardize code formatting and indentation throughout
• Adjust formatter comments positioning
• Improve readability of record definitions and builder classes

Reformat McpSchema.java and reorganize imports for improved code consistency and readability

Motivation and Context

This change improves code maintainability and consistency by:

• Standardizing code formatting throughout the McpSchema.java file
• Organizing imports in a logical order (SLF4J imports moved to top)
• Removing unused imports to reduce clutter
• Ensuring consistent indentation and brace positioning across all record definitions and builder classes

How Has This Been Tested?

• Existing unit tests should continue to pass as no functional changes were made
• Code compilation verified to ensure no syntax errors introduced
• Import organization verified to maintain all necessary dependencies

Breaking Changes

No breaking changes - this is purely a formatting and import organization change with no functional modifications.

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

This refactoring focuses solely on code style and organization:

• Applied consistent formatting to record definitions, builder classes, and enum declarations
• Adjusted @formatter:off/on comment positioning for better code structure
• Removed unused imports and Moved SLF4J Logger imports to the top of the import block for better organization
• No functional logic was modified, ensuring backward compatibility