device-plugins.md: add generic-device-plugin

I'd like to add a reference to a project I created several years ago called squat/generic-device-plugin, which allows Kubernetes to discover and allocate generic Linux devices such as the FUSE device, serial devices, Linux video devices, sound cards, USB devices, etc. This project provides access to Linux devices that do not require special, vendor-specific setup logic. It is often used in conjunction with Iot deployments, e.g. to expose ZigBee devices to a home assistant Deployment.

Author: squat

content/en/docs/concepts/extend-kubernetes/compute-storage-net/device-plugins.md

@@ -470,6 +470,7 @@ Here are some examples of device plugin implementations:
 * The [Solarflare device plugin](https://github.com/vikaschoudhary16/sfc-device-plugin)
 * The [SR-IOV Network device plugin](https://github.com/intel/sriov-network-device-plugin)
 * The [Xilinx FPGA device plugins](https://github.com/Xilinx/FPGA_as_a_Service/tree/master/k8s-device-plugin) for Xilinx FPGA devices
+* The [generic device plugin](https://github.com/squat/generic-device-plugin) for generic Linux devices and USB devices
 
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