chore: adopt the NAPALM driver standard

- CI moves to .gitea/workflows/ci.yml and calls the shared driver workflow
  of NAPALM/driver-standard: conformance, ruff, strict mypy, tests on
  3.10-3.13 and at the lowest declared versions, bandit, pip-audit, build,
  and on a release tag the upload to PyPI.
- tests/quality_baseline.json records today's long and complex functions
  and the one file over 1000 lines; they may shrink, not grow.
- Coverage floor 95 % (measured 95.15 %).
- CHANGELOG.md starts here; project links point at git.netork.io; the
  license is the SPDX string PEP 639 wants.

CHANGELOG.md

@@ -0,0 +1,17 @@
+# Changelog
+
+All notable changes to napalm-device-types. The format follows
+[Keep a Changelog](https://keepachangelog.com/), versions follow
+[Semantic Versioning](https://semver.org/). Versions up to 4.21.0 were not
+recorded here; their history is the git log.
+
+## [Unreleased]
+
+### Changed
+- The package follows the NAPALM driver standard
+  (https://git.netork.io/NAPALM/driver-standard): CI on Gitea runs ruff, strict
+  mypy, the tests on Python 3.10–3.13 and at the lowest declared versions,
+  bandit, pip-audit and a build check, and a release tag publishes to PyPI.
+- Type annotations use builtin generics (`list[str]`, `X | None`) instead of
+  `typing.List` and `Optional`. They mean the same to a type checker.
+- The project links point at git.netork.io instead of GitHub.