docs/repod/installation.rst:
Replace poetry with pdm in installation info.

Daniel M. Capella authored Aug 18, 2022 and David Runge committed Aug 21, 2022

Closes #78

docs/repod/installation.rst:
Add note about what the justfile is and when it is necessary to use it
for installation.

docs/repod/installation.rst:
Change update instructions in documentation to mention pypi package and
installing via pip.
Add information on optional dependencies which are preferred over the
internal or default functionality.

docs/repod/installation.rst:
Mention `repod-file` instead of `db2json`/ `json2db` as the latter are
removed.

docs/repod/tooling.rst:
Replace the documentation for `db2json`/ `json2db` with new
documentation on the various subcommands of `repod-file`.

pyproject.toml:
Rename project to repod.

docs/*:
Change mentions of arch-repo-management to repod.

{repod,tests}/*:
Change mentions of arch-repo-management and repo_management to repod.
Change the default configuration location to `/etc/repod.conf` and the
override location to `/etc/repod.conf.d/`.

tox.ini:
Change mentions of repo_management to repod.

docs/repod/installation.rst:
Add basic installation instructions (currently only poetry is supported,
as we do not yet have a release).