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/what-shall-we-do-drunken-sailor.tex

@@ -0,0 +1,36 @@
+\begin{song}{
+  title = {What shall we do (Drunken Sailor)},
+}
+
+% Eines der ältesten bekannten Shanties. Häufig wurden solche Shanties von
+% Matrosen auf großen Schiffen gesungen, um rhythmische Arbeitsabläufe zu
+% koordinieren - etwa beim Segelsetzen, wenn viele Männer gemeinsame „Hoo-
+% Ray“ das Seil ziehen mussten. Es gibt noch unzählige weitere Strophen, die
+% im Laufe der Zeit hinzugedichtet wurden. [Quelle: Codex]
+
+\begin{verse}
+\chord{e}What shall we do with the drunken sailor? \\
+\chord{D}What shall we do with the drunken sailor? \\
+\chord{e}What shall we do with the drunken sailor, \\
+\chord{e}e \chord{D}arly in the m \chord{e}orning?
+\end{verse}
+
+\begin{verse}
+Ref.: H \chord{e}ooray, and up she rises. H \chord{D}ooray, and up she \\
+rises. H \chord{e}ooray, and up she rises, e \chord{e}a \chord{D}rly in the m \chord{e}orning.
+\end{verse}
+
+\begin{verse}
+Put him in the long-boat till he´s sober (3x) - Hooray… \\
+Pull out the plug and wet him all over (3x) - Hooray… \\
+Keep him there and make him bale there (3x) - Hoo.. \\
+Trice him up in a runnin´ bowline (3x) - Hoo… \\
+Give him a dose of salt and water (3x) - Hoo… \\
+Stick him in the scupper with a hosepipe on him (3x)- Hoo… \\
+Stick on his back a mustard plaster (3x) - Hoo… \\
+Shave his belly with a rusty razor (3x) - Hoo… \\
+Put him in bed with the Captain´s daughter (3x) - Hoo… \\
+That´s what we do with a drunken sailor (3x) - Hoo…
+\end{verse}
+
+\end{song}