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/almost-heaven.tex

@@ -0,0 +1,38 @@
+\begin{song}{
+  title = {Almost heaven},
+  lyrics = {John Denver},
+  composer = {John Denver},
+  bulibu = 140,
+  cl = 20,
+  barde = 7,
+  libock = 10,
+}
+
+\begin{verse}
+\chord{D}Almost heaven, We \chord{h}st Virginia, \\
+blue ridge Mountains, Shena \chord{G}ndoah River. \\
+Life is old there, \chord{h}older than the trees, \\
+\chord{A}younger than the mountains growin \chord{G}g like a b \chord{D}reeze. \\
+Ref.: \\
+Country \chord{D}roads, take me ho \chord{A}me to the pl \chord{h}ace I bel \chord{G}ong: \\
+West V \chord{D}irginia, mountain m \chord{A}omma, \\
+take me h \chord{G}ome, Country ro \chord{D}ads.
+\end{verse}
+
+\begin{verse}
+All my mem’ries gather round her, \\
+miner´s lady, stranger to blue water. \\
+Dark and dusty, painted on the sky, \\
+misty taste of moonshine, teardrops in my eye. \\
+Country roads....
+\end{verse}
+
+\begin{verse}
+I hear the v \chord{A}oice in the mor \chord{D}nin´ hour she calls me, \\
+the r \chord{G}adio remind \chord{D}s me of my home \chord{A} far away, \\
+and dr \chord{h}iving down the roa \chord{C}ds \\
+I get a f \chord{G}eeling that I sh \chord{D}ould have been home \\
+ye \chord{A}sterday, yesterda \chord{A7}y, Country road \chord{D}s...
+\end{verse}
+
+\end{song}