Consolidate repod-file man page with tooling documentation
The current [tooling documentation](https://gitlab.archlinux.org/archlinux/repod/-/blob/79a0fa9aa4a4d9def6dad24805f9bbff0388f734/docs/repod/tooling.rst) (https://repod.archlinux.page/repod/tooling.html) is obsolete/incorrect after !74.
Its still valuable examples and explanations need to be consolidated with the man page for `repod-file` and the tooling page be removed.
issue