feat(noctalia): track config and enable idle behavior

Adds lock (5min) and screen-off (6min) idle timeouts, which were
previously unset so the shell never dimmed/locked.

.gitignore

@@ -34,5 +34,7 @@
 !.config/bat/config
 !.config/glow/
 !.config/glow/glow.yml
+!.config/noctalia/
+!.config/noctalia/config.toml
 !LICENSE
 !README.md