Update README.md to point at ros-typescript (#22)

Author: jtbandes

README.md

@@ -1,5 +1,8 @@
 # rosmsg-msgs-common
 
+> [!IMPORTANT]
+> This package has moved to https://github.com/foxglove/ros-typescript.
+
 [![npm version](https://img.shields.io/npm/v/@foxglove/rosmsg-msgs-common.svg?style=flat)](https://www.npmjs.com/package/@foxglove/rosmsg-msgs-common)
 
 This library exports a map of ROS 1 and ROS 2 datatype string keys to [@foxglove/message-definition](https://github.com/foxglove/message-definition) `MessageDefinition` values for most common ROS 1 and ROS 2 message definitions. The ROS 1 message definitions were extracted from the `ros:noetic-robot-focal` Docker container using the `gendeps --cat` command. ROS 2 message definitions were extracted from [rcl_interfaces](https://github.com/ros2/rcl_interfaces), [common_interfaces](https://github.com/ros2/common_interfaces), and [unique_identifier_msgs](https://github.com/ros2/unique_identifier_msgs) repository branches using the [gendeps2](https://github.com/foxglove/rosmsg/blob/main/src/gendeps2.ts) utility.