You will need to supply a process document on how the administrators are going to apply the
https://highlightjs.org/ to the site you are referring to. To do this you would need to setup the site you are referring to locally on your PC and then go through the process and document it. If you cannot do this then
DO NOT expect the administrators to do this as it will take allot of time and for just your request that has does not include any explanation as to what the benefit is or how it will make life easier or better for the site you are referring to.