LibDBIcon organize and move all return & input type classes to bottom

[Wutname1]

I was getting warnings on the functions if there was no return, so I put some blank returns

Then I moved all the return & input type classes to the bottom to try and fix the error you were seeing as noted in https://github.com/Ketho/vscode-wow-api/pull/55

[Ketho]

If you add ---@meta it will remove the warnings about missing function returns