state: Qt6::Sensors + libinput both built — 2 of 3 platform prerequisites resolved

Platform prerequisite status:
- Qt6::Sensors: BUILT (v6.11.0, 520KB pkgar, dummy backend)
- libinput: BUILT (v1.30.2, with libevdev v1.13.2 + linux-input-headers)
- QML/Quick JIT: still disabled on Redox (blocks real KWin binary,
  kirigami, plasma-framework)

KWin: now attempts real cmake build with Sensors + libinput deps
enabled. Falls back to redbear-compositor shim on cmake failure
(QML/Quick gate). Previously kwin was pure stub — now it's a
bounded build attempt with fallback.

Enabled in config (new this session):
- qt6-sensors, libevdev, libinput, kdecoration, kf6-kcmutils

Previously OOTB dependencies now resolved:
- libevdev → libinput → KWin real build path opened
- linux-input-headers → libevdev → libinput chain
- qt6-sensors → KWin Sensors dependency satisfied

local/recipes/qt/qt6-sensors/source/CMakeLists.txt

@@ -0,0 +1,27 @@
+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+
+
+cmake_minimum_required(VERSION 3.16)
+
+include(.cmake.conf)
+
+project(QtSensors
+    VERSION "${QT_REPO_MODULE_VERSION}"
+    DESCRIPTION "Qt Sensors Libraries"
+    HOMEPAGE_URL "https://qt.io/"
+    LANGUAGES CXX C
+)
+
+find_package(Qt6 ${PROJECT_VERSION} CONFIG REQUIRED COMPONENTS BuildInternals)
+
+# This should be called as early as possible, just after find_package(BuildInternals) where it is
+# defined.
+qt_internal_project_setup()
+
+find_package(Qt6 ${PROJECT_VERSION} CONFIG REQUIRED COMPONENTS Core)
+find_package(Qt6 ${PROJECT_VERSION} CONFIG OPTIONAL_COMPONENTS
+             Xml Gui Widgets Quick Qml Svg DBus QuickTest
+)
+
+qt_build_repo()