chore: adopt the NAPALM driver standard

- CI moves to .gitea/workflows/ci.yml and calls the shared driver workflow
  of NAPALM/driver-standard; .github/ is gone.
- napalm-device-types >=4.21.1 from PyPI (the floor was 0.4.0).
- LICENSE, CHANGELOG, py.typed, SPDX license string, setuptools>=77,
  version floors on the dev extra (black is gone), links to git.netork.io;
  the README names Python 3.10 and the Gitea CI.
- mypy strict for the package; napalm_fritzbox.fritzbox is exempt for now
  (6 errors), recorded in the quality baseline with four long getters.
- Coverage floor 81 % (measured 81.36 %).

CHANGELOG.md

@@ -0,0 +1,31 @@
+# Changelog
+
+All notable changes to this driver. The format follows
+[Keep a Changelog](https://keepachangelog.com/), versions follow
+[Semantic Versioning](https://semver.org/).
+
+## [Unreleased]
+
+### Changed
+- The driver follows the NAPALM driver standard
+  (https://git.netork.io/NAPALM/driver-standard): CI on Gitea runs ruff, 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. The package now ships `py.typed`
+  and a LICENSE file. Python 3.10 is the floor; napalm-device-types now comes from
+  PyPI, 4.21.1 or later.
+- A WAN connection service that fails with an unexpected error while
+  `get_wan_status()` tries it is now logged at debug level before the next one is
+  tried.
+
+## [0.2.0] - 2026-10-17
+
+### Removed
+- `get_device_warnings()`. The DSL noise margin and the firmware on offer are facts in
+  `get_system_config()` (`dsl_downstream_noise_margin`, `firmware_update_available`,
+  `firmware_version`); whether they warrant a warning is the application's decision.
+
+## [0.1.0] - 2026-06-13
+
+### Added
+- `fritzbox` driver: read-only access to AVM FritzBox routers over TR-064
+  (fritzconnection).