All: Use Lerna to manage monorepo

packages/app-desktop/commands/copyDevCommand.ts

@@ -0,0 +1,20 @@
+import { CommandRuntime, CommandDeclaration } from '@joplinapp/lib/services/CommandService';
+import { _ } from '@joplinapp/lib/locale';
+const app = require('electron').remote.app;
+const { clipboard } = require('electron');
+
+export const declaration:CommandDeclaration = {
+	name: 'copyDevCommand',
+	label: () => _('Copy dev mode command to clipboard'),
+};
+
+export const runtime = ():CommandRuntime => {
+	return {
+		execute: async () => {
+			const appPath = app.getPath('exe');
+			const cmd = `${appPath} --env dev`;
+			clipboard.writeText(cmd);
+			alert(`The dev mode command has been copied to clipboard:\n\n${cmd}`);
+		},
+	};
+};