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/packaging.txt

@@ -0,0 +1,16 @@
+This file lists known packaging formats/drafts so we know if
+we need to do anything about it (e.g. provide convenience APIs
+for some packages).
+
+Plasma: https://techbase.kde.org/Projects/Plasma/Package
+
+GGZ level packs: /playground/gamedata/README.gamedata in GGZ SVN
+
+... (TODO: find out structure of KNewStuff1 packages)
+
+I considered also:
+* Artworks
+* Kross
+* QtScript
+* Custom (standard KGHNS2 package, supported additions app-specific)
+