Changes in version 0.1.0                        

Initial scaffold

  - Package skeleton: read_hypnogram(), compute_sleep_architecture(),
    compute_cycles(), compute_transitions(), plot_hypnogram(),
    plot_architecture(), plot_transition_matrix().
  - Staging-agnostic design: all metric functions accept both full AASM
    (W / N1 / N2 / N3 / REM) and coarse actigraphy-derived (W / Sleep /
    Quiet sleep) hypnograms.
  - pkgdown site with Bootstrap 5 and Circadia Lab branding.