add script.bat.in template for general use

[kejxu]

similar to the use of the bash script template, script.bat.in will be used as a batch script wrapper for rosrun.bat (https://github.com/ms-iot/ros/blob/init_windows/tools/rosbash/CMakeLists.txt#L27)

[dirk-thomas]

Is this relay script used anywhere else beside rosbash? If not I would rather prefer the logic to be moved to the rosbash package or e.g. simply copy the file rather than using this "emulated symlink style".

[kejxu]

Is this relay script used anywhere else beside rosbash? If not I would rather prefer the logic to be moved to the rosbash package or e.g. simply copy the file rather than using this "emulated symlink style".

Totally agree! We are comfortable with this proposed change because there are existing wrappers in cmake\templates already, this added file will be a Windows counterpart of the existing script.bash.in. If later one day we/ros decide to move these into rosbash, they can be moved all at the same time =)

[dirk-thomas]

Thank you for the patch.