installation: moved from setup.py to pyproject.toml:

- updated installation to use the now standard `pyproject.toml` instead of legacy
`setup.py`. `setup.py` and other legacy files have been deleted.
- removed outdated README4PACKAGERS
- removed pylintrc which has not been correctly reviewed. Linter conf should go to
  `pyproject.toml` now.
- [hatch](https://hatch.pypa.io) is now used as main building tool. However, thanks to the
use of standards, other tools can be used too.
- update .hgignore
- several dependencies version bump, with code update to adapt to changes.

twisted/plugins/sat_plugin.py

@@ -1,76 +0,0 @@
-#!/usr/bin/env python3
-
-# Libervia: an XMPP client
-# Copyright (C) 2009-2021 Jérôme Poisson (goffi@goffi.org)
-
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Affero General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Affero General Public License for more details.
-
-# You should have received a copy of the GNU Affero General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-
-from zope.interface import implementer
-from twisted.python import usage
-from twisted.plugin import IPlugin
-from twisted.application.service import IServiceMaker
-
-# XXX: We need to configure logs before any log method is used, so here is the best place.
-from libervia.backend.core.constants import Const as C
-from libervia.backend.core.i18n import _
-
-from sat_tmp.wokkel import install as install_wokkel_patches
-
-
-install_wokkel_patches()
-
-
-def initialise(options):
-    """Method to initialise global modules"""
-    # XXX: We need to configure logs before any log method is used, so here is the best place.
-    from libervia.backend.core import log_config
-    log_config.libervia_configure(C.LOG_BACKEND_TWISTED, C, backend_data=options)
-
-
-class Options(usage.Options):
-    optParameters = []
-
-
-@implementer(IPlugin, IServiceMaker)
-class SatMaker:
-
-    tapname = C.APP_NAME_FILE
-    description = _("%s XMPP client backend") % C.APP_NAME_FULL
-    options = Options
-
-    def set_debugger(self):
-        from twisted.internet import defer
-        if defer.Deferred.debug:
-            # if we are in debug mode, we want to use ipdb instead of pdb
-            try:
-                import ipdb
-                import pdb
-                pdb.set_trace = ipdb.set_trace
-                pdb.post_mortem = ipdb.post_mortem
-            except ImportError:
-                pass
-
-    def makeService(self, options):
-        from twisted.internet import asyncioreactor
-        asyncioreactor.install()
-        self.set_debugger()
-        # XXX: Libervia must be imported after log configuration,
-        #      because it write stuff to logs
-        initialise(options.parent)
-        from libervia.backend.core.main import LiberviaBackend
-        return LiberviaBackend()
-
-
-serviceMaker = SatMaker()