Bug 509044

SUMMARY
When searching "contact" via Plasma's Application Launcher, KAddressBook appears in the search results as expected. But when searching "contacts" (with an s, i.e., plural), KAddressBook does not appear in the results.

I think it would be beneficial to modify the [.desktop file](https://invent.kde.org/pim/kaddressbook/-/blob/master/src/data/org.kde.kaddressbook.desktop) to add a (correctly localized) `Keywords[en_US]=<common terms here>` key-value pair so that, if a user types in "contacts", they see KAddressBook in the search results.

STEPS TO REPRODUCE
1. Search "contact" in Plasma's Application Launcher, note that KAddressBook appears
2. Search "contacts" in Plasma's Application Launcher, note that KAddressBook does not appear

OBSERVED RESULT
KAddressBook does not appear in the search results when typing "contacts" rather than "contact".

EXPECTED RESULT
KAddressBook should appear in the search results when typing "contacts", as it feels like an intuitive name. Right now, if a user starts typing "contacts", KAddressBook will appear (because it matches on the singular form, "contact") and then disappear as soon as the user types the final "s".

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Linux debian 6.12.37+deb13-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.12.37-1 (2025-07-11) x86_64 GNU/Linux
KDE Plasma Version: 6.3.6
KDE Frameworks Version: 6.13.0
Qt Version: 6.8.2

ADDITIONAL INFORMATION
N/A