isoexplorer 0.4.1

• Initial CRAN submission.
• Provides a Shiny GUI toolkit to browse, plot, and export stable isotope data files read with the isoreader2 package.
• Ready-to-run explorer apps: ie_explore_continuous_flow(), ie_explore_dual_inlet(), ie_explore_scans(), ie_explore_metadata(), and the multi-tab ie_create_isofiles_server().
• Composable Shiny modules (ie_file_server(), ie_metadata_ui() / *_metadata_server(), ie_*_plot_ui() / ie_*_plot_server(), ie_code_server()) to build your own app via ie_run_app().
• “Show code” feature that emits the isoreader2 code reproducing whatever is on screen, as plain R or a Quarto document.