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.
- setuptools>=77 with the SPDX license string, no License classifier,
  Python 3.10-3.13 classifiers, napalm-device-types>=4.21.1, a dev extra
  with floors, links to git.netork.io, LICENSE file, py.typed.
- CHANGELOG.md in Keep-a-Changelog form; README names Python 3.10, the
  Gitea clone URL and the new CI.
- mypy strict for the package; exempt for now (52 errors): ha, listening,
  opnsense, ospf_mixin, ping_mixin, port_forwards, resolver_mixin.
  Recorded in the quality baseline with the long and complex functions,
  the 3100-line opnsense.py and one unannotated public method.
- Coverage floor 79 % (measured 79.20 %).

README.md

@@ -14,8 +14,9 @@ NAPALM community driver for **OPNsense** firewalls (read-only, via REST API).
 
 | Dependency | Minimum version |
 |---|---|
-| Python | 3.9 |
+| Python | 3.10 |
 | NAPALM | 4.0 |
+| napalm-device-types | 4.21.1 |
 | requests | 2.28 |
 
 ## Installation
@@ -27,7 +28,7 @@ pip install napalm-opnsense
 Or from source:
 
 ```bash
-git clone https://github.com/napalm-automation-community/napalm-opnsense
+git clone https://git.netork.io/NAPALM/napalm-opnsense
 cd napalm-opnsense
 pip install -e .
 ```
@@ -201,19 +202,18 @@ d.close()
 
 ## Development
 
+The rules are in [STANDARDS.md](https://git.netork.io/NAPALM/driver-standard/src/branch/main/STANDARDS.md).
+
 ```bash
-pip install -e ".[dev]"
-pytest tests/
+python -m venv .venv && .venv/bin/pip install -e ".[dev]"
+.venv/bin/pytest --cov
 ```
 
 ## CI
 
-This project includes a GitHub Actions workflow that:
-- Runs unit tests across Python 3.9–3.12
-- Builds sdist and wheel
-- Uploads build artifacts
-
-See [.github/workflows/ci.yml](.github/workflows/ci.yml).
+[.gitea/workflows/ci.yml](.gitea/workflows/ci.yml) calls the shared workflow of the
+driver standard: ruff, mypy, the tests on Python 3.10–3.13 and at the lowest declared
+versions, bandit, pip-audit and a build check. A release tag publishes to PyPI.
 
 ## License