Import 294 songs from Carmina Leonis PDF

Add import-songs.py script that extracts songs from the PDF text
and generates .tex files with leadsheets format. Adds song
properties for all reference books (BuLiBu, BuLiBuII, CL, SwA,
Barde, LiBock). Generates all-songs.tex with alphabetical inputs.

Note: Chord alignment is approximate from PDF extraction and
may need manual review for some songs.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

songs/whiskey-in-the-jar.tex

@@ -0,0 +1,66 @@
+\begin{song}{
+  title = {Whiskey in the jar},
+  lyrics = {aus Irland},
+  composer = {aus Irland},
+  bulibu = 338,
+  cl = 40,
+  barde = 32,
+  libock = 30,
+}
+
+\begin{verse}
+As \chord{C} I was going over the f \chord{a}ar famed Kerry mountains \\
+I m \chord{F}et with Captain Farrell and his m \chord{C}oney he was counting. \\
+I first produced my pistol, and t \chord{a}hen produced my rapier. \\
+S \chord{F}aying stand and deliver, for I \chord{C}am a bold deceiver.
+\end{verse}
+
+\begin{verse}
+Ref: \\
+Musha r \chord{G7}ing dumma do damma da \\
+whack for the daddy 'oh
+\end{verse}
+
+\begin{verse}
+whack for the daddy 'oh \\
+there's w \chord{C}hiskey \chord{G7} in the j \chord{C}ar.
+\end{verse}
+
+\begin{verse}
+I counted out his money, and it made a pretty penny. \\
+I put it in my pocket and I took it home to Jenny. \\
+She said and she swore, that she never would deceive me, \\
+but the devil take the women, for they never can be easy.
+\end{verse}
+
+\begin{verse}
+I went into my chamber, all for to take a slumber, \\
+I dreamt of gold and jewels and for sure it was no wonder. \\
+But Jenny took my charges and she filled them up with water, \\
+then sent for captain Farrel to be ready for to slaughter.
+\end{verse}
+
+\begin{verse}
+It was early in the morning, as I rose up for travel, \\
+the guards were all around me and likewise captain Farrel. \\
+I first produced my pistol, for she stole away my rapier, \\
+but I couldn't shoot the water so a prisoner I was taken.
+\end{verse}
+
+\begin{verse}
+If anyone can aid me, it's my brother in the army, \\
+if I can find his station down in Cork or in Killarney. \\
+And if he'll come and save me, we'll go roving near Kilkenny, \\
+and I swear he'll treat me better than me darling sportling \\
+Jenny.
+\end{verse}
+
+\begin{verse}
+Now some men take delight in the drinking and the roving, \\
+but others take delight in the gambling and the smoking. \\
+But I take delight in the juice of the barley, \\
+and courting pretty fair maids in the morning bright and \\
+early.
+\end{verse}
+
+\end{song}