* Move the `snapcraft` configuration to `contrib`.
We're happy for people to package this as a snap image if it's useful,
but we don't support or maintain it. I'd like to move the config to
`contrib` to reflect this state of affairs.
* Changelog
* Two scripts are basically entry_points already
* Move and rename scripts/* to synapse/_scripts/*.py
* Delete sync_room_to_group.pl
* Expose entry points in setup.py
* Update linter script and config
* Fixup scripts & docs mentioning scripts that moved
Co-authored-by: Andrew Morgan <1342360+anoadragon453@users.noreply.github.com>
