Add floating windows and btop system monitor

src/lib/terminal/commands/types.ts

@@ -1,3 +1,4 @@
+import type { DesktopApp } from '#lib/content';
 import type { OutputBlock } from '../output';
 
 export interface CommandContext {
@@ -8,6 +9,7 @@ export interface CommandContext {
 	openUrl: (url: string) => void;
 	setTheme: (themeId: string) => boolean;
 	currentThemeId: () => string;
+	openApp: (app: DesktopApp) => void;
 }
 
 export interface Command {