This pull request introduces improved error handling and code clarity for MCP runtime errors by introducing a dedicated McpErrorCode enum and updating the exception handling to use structured error codes. It also updates the uipath dependency version for compatibility.

Error handling improvements:

• Introduced a new McpErrorCode enum in src/uipath_mcp/_cli/_runtime/_exception.py to provide structured, descriptive error codes for MCP-specific errors and updated all relevant exception raises in src/uipath_mcp/_cli/_runtime/_runtime.py to use this enum instead of plain strings.
  Dependency updates:

• Updated the uipath dependency version in pyproject.toml to require uipath>=2.1.108, <2.2.0 for improved compatibility and stability.