Consolidate repod-file man page with tooling documentation
The current tooling documentation (https://repod.archlinux.page/repod/tooling.html) is obsolete/incorrect after !74 (merged).
Its still valuable examples and explanations need to be consolidated with the man page for
repod-file and the tooling page be removed.
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information