tidyILD 0.0.1 (initial release)

• Initial CRAN release.
• Pipeline: ild_prepare(), ild_summary(), ild_center(), ild_lag() (index, gap-aware, time-window), ild_spacing_class(), ild_missing_pattern(), ild_check_lags().
• Modeling: ild_lme() (lmer or nlme with AR1/CAR1), ild_diagnostics(), ild_plot() (trajectory, gaps, missingness, fitted, residual ACF).
• Utilities: ild_simulate(), ild_manifest() / ild_bundle() for reproducibility, broom integration for ild_lme fits.
• Data: ema_example dataset.
• Vignettes: workflow, within-between decomposition and spacing, glossary and quick-start.