Split CLI tools
Following tracker!168 (merged), this MR moves the following subcommands to the tracker-miners repo:
Those are installed as separate executables in
$libexec/tracker/, and are moved here as they rely on details of tracker-miners generally, and tracker-miner-fs/extract specifically.
This MR essentially restores all related files to the pre-2.0 split, and reapplies all relevant patches that happened meanwhile in the tracker repo.