missPLS 0.1.0

• Initial package release.
• Added methods-first helpers for simulation, MCAR/MAR missingness generation, imputation, component selection, and standardized study summaries.
• Added packaged real datasets for the published bromhexine, tetracycline, octane, and ozone analyses.
• Added study runners for simulation and real-data workflows, plus diagnostics for correlation and VIF-style screening.
• Added long-run reproduction scripts under tools/ for complete-data, incomplete-data, and real-data article/thesis reruns.
• Added tests, vignette material, and package documentation for the CRAN-ready public API.
• Complete-data Q2 cross-validation now follows the documented plsRglm::cv.plsR(object = ...) interface, while incomplete-data Q2 selection keeps the package-side NIPALS fallback used by missPLS.