- Add footnote handling functions to allioli.awk:
- printintroductionpar() for chapter 0 prologues
- printfootnote() for displaying footnotes with proper formatting
- Updated processline() to detect and route introductions, footnotes, and verses
- Add -F flag to allioli.sh to disable footnotes
- Strip superscript numbers (⁰¹²³⁴⁵⁶⁷⁸⁹) from verse text when -F is enabled
- TSV format now supports footnotes in column 6 (number) and column 7 (text)
- Footnotes use global numbering matching superscript references in verses
