Split base cumulative patch and add relibc AIO stubs, KDE recipes

Base patch extraction (8 topic-grouped patches from the 17k-line monolith):
- P2-ps2d-improvements: PS/2 controller flush/retry, mouse state machine, named producers
- P2-storage-error-handling: AHCI/IDE/NVMe/VirtIO unwrap/expect removal
- P2-usb-pm-and-drivers: suspend/resume, SCSI enablement, staged port fallback
- P2-network-error-handling: e1000/ixgbe/rtl8139/rtl8168d/virtio-net error propagation
- P2-pcid-cfg-access: PCI config I/O port and ECAM graceful fallbacks
- P2-ihdad-hda-stream: InputStream support, public stream types, Debug derives
- P2-init-acpid-wiring: acpid weak dependency on drivers/hwd/pcid-spawner
- P2-misc-daemon-fixes: audiod/usbhidd/zerod graceful degradation

relibc P3-aio.patch: synchronous POSIX AIO fallback (aio_read, aio_write,
aio_error, aio_return, aio_cancel, aio_suspend, aio_fsync, lio_listio)
for Qt6 QIODevice compatibility. 36 patches total in relibc recipe.

KDE recipes: breeze (widget style, decorations disabled), kde-cli-tools
(kioclient, kreadconfig, etc., kdesu disabled).

recipes/core/relibc/recipe.toml

@@ -36,6 +36,7 @@ patches = [
     "../../../local/patches/relibc/P3-waitid-header.patch",
     "../../../local/patches/relibc/P3-fenv.patch",
     "../../../local/patches/relibc/P3-sched.patch",
+    "../../../local/patches/relibc/P3-aio.patch",
 ]
 
 [build]