JVD-v.2.1

✨ Features
Added support for downloading from:

• YouTube (video+audio, video only, audio only, YT Music);
• Instagram, TikTok, X.com (also can work for another social media resource).

✔ Automatic creation of download folder:

• ~/Downloads/JavaVideoDownloader;
• Download thumbnails with a dedicated button "🖼";
• Format selection via dropdown (Video+Audio, Video only, Audio only);
• Integrated progress bar with real-time status updates.

🎨 UI/UX Improvements:

• Added FlatLightLaf for a modern look & feel.