Changes in version 0.0.0.9000                      

  - First package-stage development release.
  - Preserves the validated P6.1 generic XML rectangling engine.
  - Unifies sequential and parallel execution behind parallel = FALSE,
    TRUE, or "auto" on the ordinary rectangling functions.
  - Includes conservative proposal/profile workflow, streaming,
    CSV/Parquet output, analyst-oriented single-table projection, and
    registered native C acceleration through libxml2.
  - Adds pkgdown/GitHub Pages scaffolding and package-level regression
    tests.
  - Package-check cleanup: complete public argument documentation,
    portable pkg-config Makevars syntax, explicit utils imports, and a
    regression-tested fallback fix in analyst subtree-text extraction.

  - Prepared GitHub/pkgdown publication metadata for larry77/xmlrectr,
    added GitHub installation instructions, and added Windows
    CI/source-install guidance.