Update OrbbecSDK_ROS2 to v2.3.0

orbbec_camera/examples/net_camera/README.MD

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+# Net_camera
+
+> This section describes how to use Net camera in OrbbecSDK_ROS2.Currently, only Femto_Mega devices are supported, and other Net devices will be supported in the near future.
+
+## Parameter Introduction
+
+Network device settings: default `enumerate_net_device` is set to true, which will automatically enumerate network devices.
+
+If you do not want to automatically enumerate network devices,you can set `enumerate_net_device` to false, `net_device_ip` to the device's IP address, and `net_device_port` to the default value of 8090.
+
+* `enumerate_net_device` : Enable automatically enumerate network devices.
+
+* `net_device_ip` : Setting net device's IP address.
+
+* `net_device_port` : Setting net device's port.Usually, you can set it to 8090.
+
+## Single Net camera
+
+For [femto_mega.launch.py](../../launch/femto_mega.launch.py) as an example:
+
+### automatically enumerate network devices:
+
+```bash
+ros2 launch orbbec_camera femto_mega.launch.py enumerate_net_device:=true
+```
+
+### Specify IP address to start the device:
+
+Note: `net_device_ip` needs to be changed to the IP address of the device, here it is 192.168.1.10
+
+```bash
+ros2 launch orbbec_camera femto_mega.launch.py enumerate_net_device:=false net_device_ip:=192.168.1.10 net_device_port:=8090
+```
+
+## Multi Net camera
+
+For [multi_net_camera.launch.py](./multi_net_camera.launch.py) as an example:
+
+```bash
+ros2 launch orbbec_camera multi_net_camera.launch.py
+```

orbbec_camera/examples/net_camera/multi_net_camera.launch.py

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+from launch import LaunchDescription
+from launch.actions import (
+    DeclareLaunchArgument,
+    IncludeLaunchDescription,
+    GroupAction,
+    ExecuteProcess,
+)
+from launch.launch_description_sources import PythonLaunchDescriptionSource
+from launch_ros.actions import Node
+from ament_index_python.packages import get_package_share_directory
+import os
+
+
+def generate_launch_description():
+    # Include launch files
+    package_dir = get_package_share_directory("orbbec_camera")
+    launch_file_dir = os.path.join(package_dir, "launch")
+    launch1_include = IncludeLaunchDescription(
+        PythonLaunchDescriptionSource(
+            os.path.join(launch_file_dir, "femto_mega.launch.py")
+        ),
+        launch_arguments={
+            "camera_name": "camera_01",
+            "net_device_ip": "192.168.2.10",
+            "net_device_port": "8090",
+            "sync_mode": "standalone",
+        }.items(),
+    )
+
+    launch2_include = IncludeLaunchDescription(
+        PythonLaunchDescriptionSource(
+            os.path.join(launch_file_dir, "femto_mega.launch.py")
+        ),
+        launch_arguments={
+            "camera_name": "camera_02",
+            "net_device_ip": "192.168.1.11",
+            "net_device_port": "8090",
+            "sync_mode": "standalone",
+        }.items(),
+    )
+
+    # If you need more cameras, just add more launch_include here, and change the usb_port and device_num
+
+    # Launch description
+    ld = LaunchDescription(
+        [
+            GroupAction([launch1_include]),
+            GroupAction([launch2_include]),
+        ]
+    )
+
+    return ld