feat: standards, shared CI and release tooling for NAPALM drivers

STANDARDS.md binds every repository in the NAPALM org: one default branch,
Conventional Commits, the device-types contract, test-driven development,
clean-code limits, a quality ratchet for existing code, packaging rules and
releases by tag to PyPI.

napalm-standard holds what a tool can check: the conformance check (with
release rules on a tag), the quality ratchet (ported from netOrk's
quality_ratchet.py), and the Gitea release from the CHANGELOG section.
.gitea/workflows/driver.yml is the CI every driver calls; template/ is a new
driver's starting point and passes the check as it is.

template/tests/fixtures/example24-1.0.0-show-version.txt

@@ -0,0 +1,5 @@
+Example 24 Switch
+Hostname      : sw-lab-01
+Firmware      : 1.0.0
+Serial number : EX0000000001
+Uptime        : 3 days, 4:05:06