feat(dms updater): add support for ignoring specific packages during system updates

- Added UI component & popout settings to manage ignored packages
- Added CLI support available in danklinux docs

Fixes: #2827
Closes: #2344, #1741
Port 1.5

quickshell/Common/settings/SettingsSpec.js

@@ -514,6 +514,7 @@ var SPEC = {
     updaterIntervalSeconds: { def: 1800 },
     updaterIncludeFlatpak: { def: true },
     updaterAllowAUR: { def: true },
+    updaterIgnoredPackages: { def: [] },
 
     displayNameMode: { def: "system" },
     screenPreferences: { def: {} },