milestone: 22 KF6 enabled, blake3 placeholders removed, text-login fixed

- kf6-knewstuff/kwallet: removed all-zero blake3 placeholders
- CONSOLE-TO-KDE-DESKTOP-PLAN.md: 20→22 KF6 enabled count
- BOOT-PROCESS-IMPROVEMENT-PLAN.md: text-login→graphical greeter path
- D-Bus session/kwin compositor/sessiond enhancements from Wave tasks
- Only kirigami remains suppressed (QML-dependent, environmental gate)

Zero warnings. 24 commits total.

local/recipes/kde/kf6-knewstuff/source/docs/porting.txt

@@ -0,0 +1,50 @@
+KNewStuff2 Porting Information
+==============================
+
+«Where did all the classes go?»
+
+data/
+ (GHNS format schemas and example data)
+ -> see http://ghns.freedesktop.org/spec/ now
+
+downloaddialog.*
+uploaddialog.*
+providerdialog.*
+ (graphical dialogs)
+ -> upload/providerdialog still used, in knewstuff2/ui/
+ -> the download dialog is the one from okular
+ -> the old knewstuff1 download dialog is gone
+
+ghns.*
+testnewstuff.*
+ (test applications)
+ -> see tests/ for some new tests (has its own README.tests)
+
+entry.*
+provider.*
+ (entities/data handling classes)
+ -> see knewstuff2/core/
+ -> author, feed and category are now additional entities
+
+security.*
+ -> see knewstuff2/core/
+
+knewstuffbutton.*
+ -> TODO
+ -> will go to knewstuff2/ui/ (there's already kdxsbutton)
+
+engine.*
+ (non-graphical upload/download functionality)
+ -> there are 3 engine classes now
+ -> the one in knewstuff2/core/coreengine.* is similar
+ -> but it also handles installation and caching
+ -> the one in knewstuff2/dxs/dxsengine.* implements DXS
+ -> the one in knewstuff2/engine.* is for applications (use only this one!)
+
+knewstuff.*
+knewstuffgeneric.*
+knewstuffsecure.*
+  -> doesn't exist anymore
+  -> inherited from it? bad luck, was discouraged by tutorial
+  -> all custom installation etc. is now handled by *.knsrc files
+