ci: run the tests and build the package on every push and pull request

The same job as napalm-fritzbox and napalm-opnsense: Python 3.10, 3.11 and
3.12, pytest, then wheel and sdist. napalm-device-types comes from
git.netork.io first, because PyPI has an unrelated package of that name.

pyproject gains a dev extra with pytest, which the job installs.

pyproject.toml

@@ -13,6 +13,9 @@ dependencies = [
     "requests",
 ]
 
+[project.optional-dependencies]
+dev = ["pytest"]
+
 [project.entry-points."napalm.drivers"]
 yealink = "napalm_yealink:YealinkDriver"