chore: adopt the NAPALM driver standard

- CI moves to .gitea/workflows/ci.yml and calls the shared driver workflow
  of NAPALM/driver-standard; napalm-device-types comes from git until it is
  on PyPI.
- requires-python >=3.10 (napalm-device-types needs it), LICENSE file,
  py.typed, SPDX license string, links to git.netork.io.
- mypy strict for the package; napalm_linux.linux is exempt for now (21
  errors), recorded in the quality baseline with its long functions and
  the 2200-line module. Coverage floor 58 % (measured 58.23 %).

tests/quality_baseline.json

@@ -0,0 +1,28 @@
+{
+ "coverage_floor": 58.0,
+ "function_complexity": {
+  "napalm_linux/linux.py::LinuxDriver._collect_platform_info": 24,
+  "napalm_linux/linux.py::LinuxDriver._parse_cron_line": 12,
+  "napalm_linux/linux.py::LinuxDriver.get_networks": 13,
+  "napalm_linux/linux.py::LinuxDriver.get_route_to": 23,
+  "napalm_linux/linux.py::LinuxDriver.get_snmp_config": 13,
+  "napalm_linux/linux.py::LinuxDriver.get_vpn_tunnels": 28,
+  "napalm_linux/linux.py::LinuxDriver.search_packages": 26
+ },
+ "function_lines": {
+  "napalm_linux/linux.py::LinuxDriver._collect_platform_info": 106,
+  "napalm_linux/linux.py::LinuxDriver.get_networks": 52,
+  "napalm_linux/linux.py::LinuxDriver.get_route_to": 138,
+  "napalm_linux/linux.py::LinuxDriver.get_vpn_tunnels": 152,
+  "napalm_linux/linux.py::LinuxDriver.ping": 52,
+  "napalm_linux/linux.py::LinuxDriver.search_packages": 106,
+  "napalm_linux/linux.py::LinuxDriver.uninstall_package": 51
+ },
+ "mypy_relaxed": [
+  "napalm_linux.linux"
+ ],
+ "python_file_lines": {
+  "napalm_linux/linux.py": 2318
+ },
+ "untyped_public": []
+}