Put a disk of your own in drive 1

make run-voyager and make run-cosmos now attach Disks/personal.img as the
second drive. It is made the first time it is wanted and then left alone:
a rule with no prerequisites, so make never looks at it again.

NOT UNDER build/, and that is the whole point. Everything else in this
repository is made from source and can be thrown away without losing
anything, so 'clean' empties build/ without a thought - and a disk of your
own that a clean deletes is not a disk of your own. It is the one place
here where something MADE ON THE MACHINE can live, which starts to matter
the moment there are tools on it that make things.

Disks/ is in .gitignore for the same reason: what you make on the machine
is yours and not the repository's.

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

.gitignore

@@ -36,3 +36,7 @@ Source/Emulator/rom.c
 # their own build outputs and their own compiled binaries. What this repository takes from
 # them gets vendored deliberately, with a note saying where it came from.
 /External/
+
+# The personal disk 'make run-voyager' puts in drive 1. Made on demand, never rebuilt, and
+# not cleaned - it is the one place in here where something made ON the machine can live.
+/Disks/