Move main.js to source files dir

clapper_src/main.js

@@ -0,0 +1,14 @@
+imports.gi.versions.Gdk = '4.0';
+imports.gi.versions.Gtk = '4.0';
+
+const { Gst } = imports.gi;
+const { App } = imports.clapper_src.app;
+
+Gst.init(null);
+
+function main()
+{
+    let clapper = new App({
+        playlist: ARGV
+    }).run();
+}