Perbaiki backup/restore dan script yang tidak jalan dari shortcut

Backup/restore:
- berkas .lazy (format versi 2) kini menyimpan ISI berkas: binary/script dan ikon
  (maks 512 MB per berkas); format versi 1 tetap bisa diimpor
- impor memakai shortcut.Restore: binary ditulis ke ~/.local/bin lokal, ikon dari
  cadangan (atau diunduh ulang dari icon_source), .desktop ditulis dengan path
  lokal, salinan Desktop dibuat sesuai target
- path dari komputer lama tidak dipakai mentah -> tidak ada lagi 'banyak file
  missing'; entri yang tidak bisa dipulihkan ditandai dan bisa dibetulkan via edit
- tes end-to-end: pasang 3 shortcut -> ekspor -> pulihkan di HOME lain -> semua
  berkas lokal, script hasil restore benar-benar jalan

Script:
- script dipasang sebagai wrapper + <slug>.real: wrapper menambahkan
  ~/.local/bin ke PATH dan cd ke folder asli script (desktop environment
  menjalankan dengan cwd = home, PATH sesi)
- .desktop dapat Path= sesuai folder asli script
- opsi 'Run in a terminal window (scripts)' di dialog install & edit
- uninstall membuang wrapper + script aslinya

README.md

@@ -33,6 +33,10 @@ breathes while the app is open (the koala in `assets/logo.svg` is the mascot).*
 - **Automatic type label** — every shortcut is tagged with what it actually is,
   detected from the file: `Go`, `AppImage`, `Electron`, `Script`, `Windows`, `Binary`
   (`.exe` files are launched through `wine`), or `PWA` for web apps.
+- **Scripts run properly** — the desktop environment starts programs with your home as
+  the working directory and the session `PATH`, which breaks scripts that use relative
+  paths or tools from `~/.local/bin`. LazyRun therefore installs a tiny wrapper that
+  fixes both (and can open the script in a terminal window when you tick that option).
 - **Web app shortcut** — opens the URL as an app: `--app=<url>` for
   Chromium-based browsers (Chrome, Chromium, Brave, Edge, Vivaldi, Helium,
   including Flatpak builds), `--new-window` for Firefox.