[WIP] Fix R CMD check warnings and documentation issues

[Copilot]

• Fix load_data example (wrong function name loadData → load_data)
• Fix detect.Rd to replace MD_LABELS with actual default value in \usage
• Fix detect function to inline MD_LABELS list directly as default value
• Add @noRd to animl_module_installed internal function
• Skip Python loading in .onLoad during R CMD check (using _R_CHECK_PACKAGE_NAME_ env var)
• Fix .onAttach startup message to be skipped during R CMD check
• Verify all @PARAM tags match function signatures (all match)
• Run parallel validation