fix: comprehensive boot warnings and exceptions — fixable silenced, unfixable diagnosed

Build system (5 gaps hardened):
- COOKBOOK_OFFLINE defaults to true (fork-mode)
- normalize_patch handles diff -ruN format
- New 'repo validate-patches' command (25/25 relibc patches)
- 14 patched Qt/Wayland/display recipes added to protected list
- relibc archive regenerated with current patch chain

Boot fixes (fixable):
- Full ISO EFI partition: 16 MiB → 1 MiB (matches mini, BIOS hardcoded 2 MiB offset)
- D-Bus system bus: absolute /usr/bin/dbus-daemon path (was skipped)
- redbear-sessiond: absolute /usr/bin/redbear-sessiond path (was skipped)
- daemon framework: silenced spurious INIT_NOTIFY warnings for oneshot_async services (P0-daemon-silence-init-notify.patch)
- udev-shim: demoted INIT_NOTIFY warning to INFO (expected for oneshot_async)
- relibc: comprehensive named semaphores (sem_open/close/unlink) replacing upstream todo!() stubs
- greeterd: Wayland socket timeout 15s → 30s (compositor DRM wait)
- greeter-ui: built and linked (header guard unification, sem_compat stubs removed)
- mc: un-ignored in both configs, fixed glib/libiconv/pcre2 transitive deps
- greeter config: removed stale keymapd dependency from display/greeter services
- prefix toolchain: relibc headers synced, _RELIBC_STDLIB_H guard unified

Unfixable (diagnosed, upstream):
- i2c-hidd: abort on no-I2C-hardware (QEMU) — process::exit → relibc abort
- kded6/greeter-ui: page fault 0x8 — Qt library null deref
- Thread panics fd != -1 — Rust std library on Redox
- DHCP timeout / eth0 MAC — QEMU user-mode networking
- hwrngd/thermald — no hardware RNG/thermal in VM
- live preload allocation — BIOS memory fragmentation, continues on demand

local/recipes/qt/qtwayland/source/examples/wayland/minimal-qml/main.qml

@@ -0,0 +1,62 @@
+// Copyright (C) 2017 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+import QtQuick
+import QtQuick.Window
+import QtWayland.Compositor
+import QtWayland.Compositor.XdgShell
+import QtWayland.Compositor.WlShell
+import QtWayland.Compositor.IviApplication
+
+//! [compositor]
+WaylandCompositor {
+//! [compositor]
+    // The output defines the screen.
+
+    //! [output]
+    WaylandOutput {
+        sizeFollowsWindow: true
+        window: Window {
+            width: 1024
+            height: 768
+            visible: true
+    //! [output]
+
+            //! [shell surface item]
+            Repeater {
+                model: shellSurfaces
+                // ShellSurfaceItem handles displaying a shell surface.
+                // It has implementations for things like interactive
+                // resize/move, and forwarding of mouse and keyboard
+                // events to the client process.
+                ShellSurfaceItem {
+                    shellSurface: modelData
+                    onSurfaceDestroyed: shellSurfaces.remove(index)
+                }
+            }
+            //! [shell surface item]
+        }
+    }
+
+    // Extensions are additions to the core Wayland
+    // protocol. We choose to support three different
+    // shells (window management protocols). When the
+    // client creates a new shell surface (i.e. a window)
+    // we append it to our list of shellSurfaces.
+
+    //! [shells]
+    WlShell {
+        onWlShellSurfaceCreated: (shellSurface) => shellSurfaces.append({shellSurface: shellSurface});
+    }
+    XdgShell {
+        onToplevelCreated: (toplevel, xdgSurface) => shellSurfaces.append({shellSurface: xdgSurface});
+    }
+    IviApplication {
+        onIviSurfaceCreated: (iviSurface) => shellSurfaces.append({shellSurface: iviSurface});
+    }
+    //! [shells]
+
+    //! [model]
+    ListModel { id: shellSurfaces }
+    //! [model]
+}