Add TOOLING.jsh load file to have better and built-in access for tools shipping with the JDK and their command-line interface. See a related blog post introducing and show use-cases of TOOLING.jsh at https://sormuras.github.io/blog/2023-03-09-jshell-tooling

The goal of this enhancement is to enable this single-line command for users:

jshell TOOLING

Today users need the following two-step dance to load the script:

jshell
jshell> /open https://github.com/sormuras/jdk-tools/raw/main/TOOLING.jsh

This goal can be achieved by placing a copy of TOOLING.jsh into src/jdk.jshell/share/classes/jdk/jshell/tool/resources - as a sibling to the existing scripts `DEFAULT.jsh` and `PRINTING.jsh`.