We want to have SPDX License markers, as those are more machine readable.
Properly we can also get rid of the license header in each file.
**Tier 0**
[ ] extra-cmake-modules
**Tier 1**
[x] attica -> D27106
[x] bluez-qt -> D27231
[ ] breeze-icons
[ ] kapidox
[x] karchive -> D27104
[x] kcalendarcore -> D27361
[x] kcodecs -> D27741
[x] kconfig -> D27601
[x] kcoreaddons -> D27738
[x] kdav -> D27571
[x] kdbusaddons -> D27602
[x] kdnssd -> D27603
[x] kguiaddons -> D27297
[x] kholidays-> D27363
[x] ki18n -> D27245
[x] kidletime -> D26931
[x] kirigami -> D27364
[x] kitemmodels -> D27103
[x] kitemviews -> D27428
[x] kplotting -> D27234
[x] kquickcharts -> D27243
[ ] syntax-highlighting
[x] kuserfeedback -> D28381
[x] kwayland -> D28058
[ ] kwidgetsaddons -> D28379
[x] kwindowsystem -> D28056
[x] modemmanager-qt -> D27769
[x] networkmanager-qt -> D27932
[ ] oxygen-icons5
[x] prison -> D27092
[x] qqc2-desktop-style -> D28382
[x] solid -> D27742
[x] sonnet -> D27091
[x] threadweaver -> D27429
**Tier 2**
[ ] kactivities
[ ] kauth
[ ] kcompletion
[ ] kcontacts
[ ] kcrash
[ ] kdoctools
[ ] kfilemetadata
[ ] kimageformats
[ ] kjobwidgets
[ ] knotifications
[ ] kpackage
[ ] kpty
[ ] kunitconversion
[ ] syndication
**Tier 3**
[ ] baloo
[ ] kactivities-stats
[ ] kbookmarks
[ ] kcmutils
[ ] kconfigwidgets
[ ] kdeclarative
[ ] kded
[ ] kdesu
[ ] kemoticons
[ ] kglobalaccel
[ ] kiconthemes
[ ] kinit
[ ] kio
[ ] knewstuff
[ ] knotifyconfig
[ ] kparts
[ ] kpeople
[ ] krunner
[ ] kservice
[ ] ktexteditor
[ ] ktextwidgets
[ ] kwallet
[ ] kxmlgui
[ ] kxmlrpcclient
[ ] plasma-framework
[ ] purpose
**Tier 4**
[ ] frameworkintegration
**Porting Aids**
[ ] kdelibs4support
[ ] kdewebkit
[ ] kdesignerplugin
[ ] khtml
[ ] kjs
[ ] kjsembed
[ ] kmediaplayer
[ ] kross