Reuse-ify project

I created a script for generating the reuse license information from git blame: https://invent.kde.org/-/snippets/2667

Reuse lint output is now:

# MISSING COPYRIGHT AND LICENSING INFORMATION

The following files have no copyright and licensing information:
* poqm/ar/kaidan_qt.po
* poqm/cs/kaidan_qt.po
* poqm/de/kaidan_qt.po
* poqm/el/kaidan_qt.po
* poqm/en_GB/kaidan_qt.po
* poqm/es/kaidan_qt.po
* poqm/eu/kaidan_qt.po
* poqm/fi/kaidan_qt.po
* poqm/fr/kaidan_qt.po
* poqm/gl/kaidan_qt.po
* poqm/he/kaidan_qt.po
* poqm/hu/kaidan_qt.po
* poqm/hy/kaidan_qt.po
* poqm/ie/kaidan_qt.po
* poqm/it/kaidan_qt.po
* poqm/ja/kaidan_qt.po
* poqm/ka/kaidan_qt.po
* poqm/ko/kaidan_qt.po
* poqm/lt/kaidan_qt.po
* poqm/mr/kaidan_qt.po
* poqm/ms/kaidan_qt.po
* poqm/nb/kaidan_qt.po
* poqm/nl/kaidan_qt.po
* poqm/pa/kaidan_qt.po
* poqm/pl/kaidan_qt.po
* poqm/pt_BR/kaidan_qt.po
* poqm/ru/kaidan_qt.po
* poqm/sk/kaidan_qt.po
* poqm/sl/kaidan_qt.po
* poqm/sv/kaidan_qt.po
* poqm/tr/kaidan_qt.po
* poqm/uk/kaidan_qt.po
* poqm/zh_CN/kaidan_qt.po
* poqm/zh_TW/kaidan_qt.po

The following files have no licensing information:
* poqm/ca/kaidan_qt.po
* poqm/ca@valencia/kaidan_qt.po
* poqm/pt/kaidan_qt.po


# SUMMARY

* Bad licenses:
* Deprecated licenses:
* Licenses without file extension:
* Missing licenses:
* Unused licenses:
* Used licenses: Apache-2.0, BSD-2-Clause, CC-BY-SA-4.0, CC0-1.0, GPL-3.0-or-later, LGPL-2.1-or-later, MIT
* Read errors: 0
* Files with copyright information: 377 / 411
* Files with license information: 374 / 411

The automatically created translation files unfortunately cannot be 'tagged' correctly. This is a general problem, also in other KDE projects.