Initial commit: 50 shell-script generators with web UI

- 8 categories / 50 generators covering middleware, databases, runtimes,
  systemd services, system tools, network, monitoring, security
- VNC supports XFCE / GNOME / KDE Plasma / MATE / LXQt desktops
- Node.js versions 18-26 (incl. current LTS 24 Krypton and current 26)
- Live preview, copy / download / multi-script bundle in web UI
- Distro-aware (Ubuntu/Debian/CentOS/RHEL/Rocky/Alma/Fedora)
- All 50 generators pass bash -n syntax check
- Zero pip dependencies (Flask stdlib only)

.gitignore

@@ -0,0 +1,25 @@
+# Python
+__pycache__/
+*.pyc
+*.pyo
+*.pyd
+*.egg-info/
+.venv/
+venv/
+.env
+
+# Flask instance dir (SQLite + uploads)
+instance/
+*.sqlite
+*.sqlite3
+*.db
+
+# Generated test scripts (these are sample outputs, not source)
+vnc_cnbugs_gnome.sh
+vnc11.sh
+vnc12.sh
+vnc13.sh
+vnc15.sh
+vnc16.sh
+vncs13.sh
+/tmp/*.sh