feat: Qt6 Sensors v6.11.0 — builds on Redox, pkgar in repo

- Created local/recipes/qt/qt6-sensors with real cmake build
- Replaced WIP stub (Qt 6.6.1) with Qt 6.11.0 source matching qtbase
- Sensorfw disabled (Linux-specific), SBOM generation off
- Dummy backend provides no-op sensor readings
- Enabled in redbear-full.toml config
- Unblocks KWin real build (Qt6::Sensors prerequisite resolved)
- Stage.pkgar: 520KB in repo

recipes/wip/libs/qt/qt6/qt6-sensors/recipe.toml

@@ -1,5 +0,0 @@
-#TODO not compiled or tested
-[source]
-tar = "https://download.qt.io/official_releases/qt/6.6/6.6.1/submodules/qtsensors-everywhere-src-6.6.1.tar.xz"
-[build]
-template = "configure"

recipes/wip/libs/qt/qt6/qt6-sensors/recipe.toml

@@ -0,0 +1 @@
+../../local/recipes/qt/qt6-sensors/recipe.toml