fix: KF6 config, kwin stub, docs, greeter, I2C/GPIO drivers, bootstrap

- KF6 config: enable 31 KF6 frameworks + kdecoration + kglobalacceld
  (was only kwin stub; 22 additional recipes now enabled)
- KWin: honest #TODO naming real blockers (Qt6::Sensors WIP,
  libinput ignored, no canberra); kwin_wayland shim delegates to
  redbear-compositor
- Greeter: enable redbear-greeterd replacing /usr/bin/true stub
- Mini config: suppress curl/git/mc (broken deps, not boot-critical)
- Docs: fix KF6 count (9->31 enabled), kwin status (stub, not real
  build), plasma blocked, config surface accuracy across
  CONSOLE-TO-KDE-DESKTOP-PLAN, DESKTOP-STACK-CURRENT-STATUS,
  local/AGENTS
- P2-i2c-gpio-ucsi-drivers.patch: 10 I2C/GPIO/UCSI daemon sources
  (gpiod, i2cd, dw-acpi-i2cd, intel-lpss-i2cd, i2c-gpio-expanderd,
  intel-gpiod, i2c-hidd, ucsid, i2c-interface, acpi-resource);
  amd-mp2-i2cd + intel-thc-hidd excluded (PCI API changed)
- P0-bootstrap-workspace-fix.patch: empty [workspace] in bootstrap
  Cargo.toml prevents auto-detection of parent workspace (fixes
  base-initfs from-scratch build)
- QEMU boot verified: kernel -> PCI -> NVMe -> ACPI -> display ->
  networking -> services -> RB_SERIAL_PROBE_OK

config/redbear-greeter-services.toml

@@ -64,12 +64,18 @@ type = "oneshot_async"
 path = "/usr/lib/init.d/20_greeter.service"
 data = """
 [unit]
-description = "Red Bear greeter service (disabled for Phase 2 compositor proof; re-enable for Phase 3 user sessions)"
+description = "Red Bear greeter service (experimental — Phase 3 user session bring-up)"
 requires_weak = [
+    "00_pcid-spawner.service",
+    "12_dbus.service",
+    "13_redbear-sessiond.service",
+    "13_seatd.service",
+    "19_redbear-authd.service",
 ]
 
 [service]
-cmd = "/usr/bin/true"
+cmd = "/usr/bin/redbear-greeterd"
+envs = { VT = "3", REDBEAR_GREETER_USER = "greeter", KWIN_DRM_DEVICES = "/scheme/drm/card0", REDBEAR_DRM_WAIT_SECONDS = "10" }
 type = "oneshot_async"
 """