kwin: plugin path fix + KF6Svg stub + QmlPlugins cleanup

- Mirror usr/plugins/*.so to plugins/ for cmake Imported target verification
- Delete QmlPlugins dirs (reference host QML paths)
- Stub KF6Svg cmake config
- Remove UiTools/Sensors from Qt6 find_package
- Blocked: KF6Svg requires KF6Config.cmake component registration

local/recipes/drivers/redox-driver-sys/source/src/irq.rs

@@ -405,3 +405,44 @@ mod tests {
         }
     }
 }
+
+/// Standard MSI (non-X) interrupt allocation.
+/// For devices that support MSI but not MSI-X.
+pub struct MsiAllocation {
+    pub irq: u8,
+    pub fd: crate::pci::IrqFd,
+    pub vector_count: u8,
+}
+
+impl MsiAllocation {
+    #[cfg(target_os = "redox")]
+    pub fn request(multiple_message_capable: u8, requested: u8) -> Result<Self> {
+        let cpu_id = read_bsp_cpu_id()?;
+        let count = requested.min(1u8 << multiple_message_capable);
+        let (irq, fd) = allocate_irq_vector(cpu_id)?;
+        log::info!("redox-driver-sys: allocated MSI vector -> irq {} on cpu {}", irq, cpu_id);
+        Ok(Self { irq, fd, vector_count: count })
+    }
+
+    #[cfg(not(target_os = "redox"))]
+    pub fn request(_multiple_message_capable: u8, _requested: u8) -> Result<Self> {
+        Err(DriverError::Irq("MSI allocation is only available on target_os=redox".into()))
+    }
+}
+
+/// Set IRQ affinity to a specific CPU.
+/// Returns true if the affinity was successfully changed.
+#[cfg(target_os = "redox")]
+pub fn irq_set_affinity(irq: u8, cpu_id: u32) -> Result<()> {
+    use std::io::Write;
+    let path = format!("/scheme/irq/{}/affinity", irq);
+    let mut f = std::fs::OpenOptions::new().write(true).open(&path)
+        .map_err(|e| DriverError::Irq(format!("failed to open {}: {}", path, e)))?;
+    f.write_all(&cpu_id.to_ne_bytes())
+        .map_err(|e| DriverError::Irq(format!("failed to set affinity: {}", e)))
+}
+
+#[cfg(not(target_os = "redox"))]
+pub fn irq_set_affinity(_irq: u8, _cpu_id: u32) -> Result<()> {
+    Err(DriverError::Irq("IRQ affinity is only available on target_os=redox".into()))
+}