Add --separate-debug-symbols option similar to cargo deb

[jabl]

cargo deb has the --separate-debug-symbols option which causes the debug symbols of the binaries/libraries to be placed in separate files installed under /usr/lib/debug. Could something similar be added to cargo-generate-rpm as well?

And for extra brownie points, if it would also be possible (via another option) to split these debug symbols into a separate debuginfo package, so that users who are not interested in the debug symbols don't have to have them?

[cat-in-136]

Currently no plan to introduce debug symbol handling. In addition, there is no subpackaging (creating foobar-devel package and foobar-debuginfo) support now.