Update documentation

[h3adache]

Features such as HOOKPATH/SCRIPTPATH/DRIVERPATH etc should be documented in --help and the online docs

[hazendaz]

@harawata , as noted on PR #491 , the documentation is quite out of date, seems that was even the case in 2017. We need to go back through that, AI will probably help assist there in getting it updated quickly. Although I was well aware things like readme badges were out of whack on all mybatis projects and new what needed updated for the most part, I used AI to more quickly do that which also helped improve things like linking license here to the one github resolved directly off the project instead of statically assuming it was apache 2.0. Anyway, that seemed useful there, I'm sure it will be with rest of it. I just don't know that I will get to this any time soon, probably same for yourself but at least wanted to comment on it so we are aware.