Added tools & updated hyprlock config

Changelog:
- Added packages: `emmet-language-server`, `gitleaks`, `trunk`
- Changed time format in `hyprlock` from 24-hour to 12-hour format
- Configured `emmet-language-server` for the `helix` editor

nixos/terminal-utils.nix

@@ -7,6 +7,7 @@
     lazygit
     license-generator
     git-ignore
+    gitleaks
     pass-git-helper
     just
     xh