Create rog-platform, refactor rogcc ipc-file handling

- Create new rog-platform crate to manage all i/o in a universal way
  + kbd-led handling
  + platform handling (asus-nb-wmi)
  + hidraw
  + usbraw
- Refactor how ROGCC handles IPC for background open, run-in-bg

rog-platform/src/usb_raw.rs

@@ -0,0 +1,48 @@
+use rusb::{Device, DeviceHandle};
+use std::time::Duration;
+
+use crate::error::{PlatformError, Result};
+
+#[derive(Debug, PartialEq)]
+pub struct USBRaw(DeviceHandle<rusb::GlobalContext>);
+
+impl USBRaw {
+    pub fn new(id_product: u16) -> Result<Self> {
+        for device in rusb::devices()?.iter() {
+            let device_desc = device.device_descriptor()?;
+            if device_desc.vendor_id() == 0x0b05 && device_desc.product_id() == id_product {
+                let handle = Self::get_dev_handle(device)?;
+                return Ok(Self(handle));
+            }
+        }
+
+        Err(PlatformError::MissingFunction(format!(
+            "USBRaw dev {} not found",
+            id_product
+        )))
+    }
+
+    fn get_dev_handle(
+        device: Device<rusb::GlobalContext>,
+    ) -> Result<DeviceHandle<rusb::GlobalContext>> {
+        // We don't expect this ID to ever change
+        let mut device = device.open()?;
+        device.reset()?;
+        device.set_auto_detach_kernel_driver(true)?;
+        device.claim_interface(0)?;
+        Ok(device)
+    }
+
+    pub fn write_bytes(&self, message: &[u8]) -> Result<usize> {
+        self.0
+            .write_control(
+                0x21,  // request_type
+                0x09,  // request
+                0x35e, // value
+                0x00,  // index
+                message,
+                Duration::from_millis(200),
+            )
+            .map_err(|e| PlatformError::USB(e))
+    }
+}