include man in ucore and ucore-hci images

[johnmmcgee]

What: Include the man package in the ucore and ucore-hci images.

Why: The ability to have offline access to documentation is not only a "nice to have" but at times an essential item when configuring a system that may not have network access available at the given time.

Solution: add 'man' to the package list.

[bsherman]

I did some testing on this... apparently, some RPMs don't install the man pages if man itself isn't installed first?

Example: one can install man-db and then notice that tnere are no man pages for bash. Despite them being listed in rpm -ql bash. This differs from silverblue.

I suspect it has something to do with the original image composition.

[bsherman]

I think we want to move forward with this even if all the man files aren't present for some packages initially.

Things like zpool help don't even work without the man binary being present.