Raft of repository maintenance and updates (#57)

- Switch to pyproject.toml
- Update pre-commits, and switch to ruff for linting, sorting
- Run most of the ruff auto-fixers
- Switch to using GitHub actions instead of Azure

Author: ndevenish

.azure-pipelines/azure-pipelines.yml

@@ -7,7 +7,7 @@ serialize =
 	{major}.{minor}.{patch}
 	{major}.{minor}
 
-[bumpversion:file:setup.py]
+[bumpversion:file:pyproject.toml]
 search = version="{current_version}"
 replace = version="{new_version}"