Every score on the disk, not a named one

The makefile compiled splash.score by name, so intro.score sat beside it
turning into nothing - which is exactly the failure the mirror three
lines above exists to prevent, and its comment says so: a list in a
makefile goes stale the moment somebody adds a file, and what they forgot
is invisible until they go looking for it on the machine.

Found by the user going looking for it on the machine.

Every .score in Programs/Tunes is compiled and put on the disk now, and
every patch in Programs/Sounds is converted first so a score can name any
of them. The source is mirrored to /Source/Tunes with everything else
that was written; the tune goes to the root, where a program looking for
one expects it - which is worth writing down, because the two being in
different places is the thing that sent somebody hunting.

two.score moved to Tests. It is a fixture, it names patches that only
exist in the test build, and it was in the music tree only because that
is where scores were when it was written - which the game disk build
found immediately by failing to compile it.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01E2JrLzFvuFX9fgi1LDRjrW

Tests/two.score

@@ -0,0 +1,24 @@
+; Tests/two.score
+; The smallest thing that is a tune: one voice, two sequences, and an instrument change.
+; Written by Anachronaut
+;
+; BOTH NOTES ARE NUMBER 60. The octave between them is the #Use in the second sequence, which
+; loads the other patch - so what this plays says the whole path works: a header, a tick taken
+; from it, two tables relocated, an order list followed, and a patch out of the file.
+
+#Tick 0d125000              ; A sixteenth note at 120 beats a minute.
+
+#Patch Low  low.patch
+#Patch High high.patch
+
+#Voice 0d0 Low                ; What voice nought starts on. The other three have no part.
+
+#Sequence Plain
+  0d60 0d4
+
+#Sequence Octave
+  #Use High                 ; A command, which takes no tick at all.
+  0d60 0d4
+
+#Order 0d0
+  Plain Octave