feat: update hyprland, helix, bootloader and other configs

Changelog:
- autostart: remove hypridle from autostart script
- helix: add copilot LSP for Rust, JS/TS variants
- hyprland:
  - Refactor window rules with regex patterns
  - Update brightness controls for intel_backlight
  - Adjust pyprland scratchpad configurations
- bootloader:
  - Add i915 kernel modules
  - Disable initrd verbose logging
- greetd: update tuigreet command to use uwsm
- hyprland: enable hyprlock, hypridle services
- linux-kernel: add security hardening params
- ollama: add new LLM models (gemma3, deepcoder)
- utils: add sqlx-cli and kitty
- kitty: add config
- virtualisation:
  - Add lima, nerdctl
- vpn:
  - Enable mullvad VPN
  - Add mullvad and tor browsers
- stylus-themes: update to latest

nixos/flake.nix

@@ -50,7 +50,7 @@
         ./mosh.nix
         ./firewall.nix
         ./dns.nix
-        # ./vpn.nix
+        ./vpn.nix
         ./users.nix
         ./virtualisation.nix
         ./programming-languages.nix