Add footnote support to allioli with Unicode superscripts

- 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

allioli.sh

@@ -22,6 +22,7 @@ show_help() {
 	echo
 	echo "  -l      list books"
 	echo "  -W      no line wrap"
+	echo "  -F      no footnotes"
 	echo "  -h      show help"
 	echo
 	echo "  Reference types:"
@@ -64,6 +65,9 @@ while [ $# -gt 0 ]; do
 	elif [ "$1" = "-W" ]; then
 		export ALLIOLI_NOLINEWRAP=1
 		shift
+	elif [ "$1" = "-F" ]; then
+		export ALLIOLI_NOFOOTNOTES=1
+		shift
 	elif [ "$1" = "-h" ] || [ "$isFlag" -eq 1 ]; then
 		show_help
 	else