Merge branch 'develop' into update-readme-badges

.github/workflows/sign-off.yml

.github/workflows/tests.yml

Dockerfile

README.md

changelog.d/888.bugfix

changelog.d/897.bugfix

changelog.d/897.removal

changelog.d/898.misc

changelog.d/900.misc

changelog.d/901.misc

changelog.d/902.bugfix

config/config.sample.yaml

package.json

src/bot.ts

src/channelsyncroniser.ts

src/clientfactory.ts

src/discordcommandhandler.ts

src/discordmessageprocessor.ts

src/log.ts

src/matrixcommandhandler.ts