easytable `2.1.0`

First public release of easytable: easy to use, easy to read regression tables with consistent output across Word, HTML, and LaTeX/PDF.

Highlights

Added export.word for direct .docx export.
Standardized CSV export naming to export.csv.
Improved cross-format design consistency (Word/HTML/LaTeX) using LaTeX style as reference.
Enforced key table invariants:
- coefficients and standard errors in the same cell with a true line break,
- zebra striping restricted to coefficient rows,
- single divider between coefficients and model statistics.
Improved interaction-term wrapping for narrower term columns.
Expanded and stabilized tests and documentation.