I thought ruff check would also format, but it doesn't.

This runs ruff format in CI and dev scripts. The first commit is just a
run of `ruff format .` in the root directory.

This stops people from getting half way through a step and it failing
due to the github token having expired (this happens to me every damn
time).

During the migration the automated script to update the copyright
headers accidentally got rid of some of the existing copyright lines.
Reinstate them.

* Add reminder to check special release notes board in release script

* Newsfile

Signed-off-by: Olivier Wilkinson (reivilibre) <oliverw@matrix.org>

* Update release.py

* Bah, black

---------

Signed-off-by: Olivier Wilkinson (reivilibre) <oliverw@matrix.org>

* Ditch dependabot changelog workflow

* Summarise dependabot commits in release script

* Changelog

* Update scripts-dev/release.py

* Remind maintainer to ask #synapse-dev for changelog

* Changelog

* Fix typo in release script

* Changelog

* Enable `--warn-redundant-casts` option in mypy

Doesn't do much but helps me sleep better at night.

* Changelog

* Fix name of the ignore

* Fix one more missed cast

Not sure why I didn't see this one locally, maybe I needed a poetry update

* Remove old comment

Co-authored-by: Patrick Cloke <clokep@users.noreply.github.com>

Co-authored-by: Patrick Cloke <clokep@users.noreply.github.com>

* Remove unused type-ignores

Oversights in #14427 and #14429.

* Changelog

Extend the release script to wait for GitHub Actions to finish and to be usable as a guide for the whole process. (#13483)

Add a `merge-back` command to the release script, which automates merging the correct branches after a release. (#13393)

Extend the release script to automatically push a new SyTest branch, rather than having that be a manual process. (#12978)

Co-authored-by: Andrew Morgan <1342360+anoadragon453@users.noreply.github.com>

Check we're on the right branch before tagging, and on the right tag before uploading

* Abort if we're on the wrong branch
* Check we have the right tag checked out
* Clarify that `publish` only releases to GitHub

Not enforced in config yet. One day.

Poetry now manages the project version in pyproject.toml.

The release script used to incorrectly write `New synapse release 1.57.0~rc1.`
instead of `New synapse release 1.57.0rc1.`

As we want to include the previous version in the "No new changes..."
string.

Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>

* rename major/minor into the right semver terminology minor/patch (since this was something that got me very confused the first couple of times I've used the script)
* name the release branch based on the new version, not the previous one

With the prior format, 1.33.0 / 1.33.1 / 1.33.2 got separate branches:

    release-v1.33.0
    release-v1.33.1
    release-v1.33.2

Under the new model, all three would share a common branch:

    release-v1.33

As before, RCs and actual releases exist as tags on these branches.

This better reflects our support model, e.g., that the "1.33" series had
a formal release followed by two patches / updates.

Signed-off-by: Dan Callahan <danc@element.io>

Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>
Co-authored-by: Andrew Morgan <1342360+anoadragon453@users.noreply.github.com>