Add a soprano recorder tab converter as a Linux AppImage.

The app turns a lead line into Baroque fingering tabs with rhythm kept, ships Twinkle and Ode to Joy, and reads photos locally with oemer when the bundled Python is present.

Co-authored-by: catpersonisme <catpersonisme@gmail.com>

electron/before-build.cjs

@@ -0,0 +1,9 @@
+// The Next standalone server ships its own node_modules as an extra resource.
+// Returning false tells electron-builder to leave the project node_modules out
+// of the AppImage. Those packages are not what the window runs.
+async function beforeBuild() {
+  return false;
+}
+
+module.exports = beforeBuild;
+module.exports.beforeBuild = beforeBuild;