snippets: add USB/IP on native simulator snippet

Snippet that helps to build USB device samples with virtual device and
host controllers and USBIP support.

Signed-off-by: Johann Fischer <johann.fischer@nordicsemi.no>

Author: jfischer-no

snippets/usbip-native-sim/README.rst

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+.. _snippet-usbip-native-sim:
+
+USB/IP on Native Simulator Snippet (usbip-native-sim)
+#####################################################
+
+.. code-block:: console
+
+   west build -S usbip-native-sim [...]
+
+Overview
+********
+
+This snippet allows to configure USB device samples with USB/IP support on a
+native simulator. When building samples with this snippet, you need to provide
+samples DTC overlays using the EXTRA_DTC_OVERLAY_FILE argument.
+
+This snippet is experimental, the behavior may change without notice.

snippets/usbip-native-sim/snippet.yml

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+name: usbip-native-sim
+append:
+  EXTRA_CONF_FILE: usbip-native-sim.conf
+  EXTRA_DTC_OVERLAY_FILE: usbip-native-sim.overlay

snippets/usbip-native-sim/usbip-native-sim.conf

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+CONFIG_NETWORKING=y
+CONFIG_NET_IPV4=y
+CONFIG_NET_TCP=y
+CONFIG_NET_SOCKETS=y
+
+# Network address config
+CONFIG_NET_CONFIG_SETTINGS=y
+CONFIG_NET_CONFIG_NEED_IPV4=y
+CONFIG_NET_CONFIG_MY_IPV4_ADDR="192.0.2.1"
+CONFIG_NET_CONFIG_PEER_IPV4_ADDR="192.0.2.2"
+
+CONFIG_NET_LOG=y
+
+CONFIG_USB_HOST_STACK=y
+CONFIG_USBH_LOG_LEVEL_WRN=y
+CONFIG_UHC_DRIVER_LOG_LEVEL_WRN=y
+CONFIG_USBIP=y
+CONFIG_USBIP_LOG_LEVEL_WRN=y
+CONFIG_SYS_CLOCK_TICKS_PER_SEC=1000000
+CONFIG_UHC_BUF_COUNT=32
+CONFIG_UHC_XFER_COUNT=32

snippets/usbip-native-sim/usbip-native-sim.overlay

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+/*
+ * Copyright (c) 2025 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/delete-node/ &zephyr_udc0;
+
+/ {
+	zephyr_uhc0: uhc_vrt0 {
+		compatible = "zephyr,uhc-virtual";
+
+		zephyr_udc0: udc_vrt0 {
+			compatible = "zephyr,udc-virtual";
+			num-bidir-endpoints = <8>;
+			maximum-speed = "high-speed";
+		};
+	};
+};