Add options to define sysimage / app attributes ?

Hi, I've been testing `PackageCompiler` for both sysimages and apps and I was wondering if you planned to add the possibility to set attributes for the executable or the dll.

Among those attributes I think these would be helpful :
- Version of the exe / dll
- Icon
- Author
- Licence

I asked [a question about this a few days ago on the discourse](https://discourse.julialang.org/t/define-edit-sysimage-attributes-with-julia/81786), but got no feedback so far.

Review PackageCompiler's existing sysimage and app generation paths, focusing on how executables and DLLs are produced. Determine how version, icon, author, and licence attributes should be specified and verify that the chosen attributes appear in generated outputs.

Written by the indexing model from the issue text.