Initial scaffold: idempotent Sunshine + Moonlight installer for Omarchy

Sets up bidirectional game streaming across Omarchy/Hyprland/Wayland
machines (NVIDIA desktop and AMD Framework laptop), with the Macbook
as an additional Moonlight client.

The same install.sh runs on either machine; GPU vendor is detected at
runtime and the appropriate hardware-encode packages are installed.

Includes:
- KMS capture setup (cap_sys_admin on sunshine, input group, uinput udev rule)
- ufw / firewalld port opening when a firewall is active
- systemd --user service + loginctl enable-linger for always-on hosting
- uninstall.sh with --purge for user data removal
- Flags to install host-only or client-only

.gitignore

@@ -0,0 +1,8 @@
+*.swp
+*.swo
+*.bak
+*.bak.*
+.DS_Store
+.idea/
+.vscode/
+.claude/settings.local.json