add --repofromdir option

[oliverkurth]

This adds the --repofromdir option. It is similar to --repofrompath, except it does not require any metadata. Usage:

tdnf --repofromdir=vim,/root/vim install vim

The directory contains the packages. The directory must be on the filesystem, no URLs will be accepted. All files in the directory with names ending in .rpm will be added. Sub directories will be recursed, skipping names starting with a dot (.).

This is useful for a quick setup without the need to create a repo using createrepo, however it is less efficient than using a repo with metadata.