DEVX-118: feat: enhance documentation-as-code with badges, version refs, Vale

- Fix badge system: clean .badges dir from orphan branch, add version
  verification, make badges job depend on release (avoids stale version
  badge race condition)
- Add check_doc_versions.py: lint tool that verifies docs version
  references match current __version__, with --fix for auto-update
- Integrate check_doc_versions into release process (auto-updates docs
  on every release commit)
- Add Vale prose linter integration: .vale.ini, custom styles for
  terminology and code block language, CI step, make target
- Fix stale version references in docs (0.27.0 → 0.33.4)
- Fix e.g. → for example in docs (Google.Latin Vale rule)
- Add CI steps for check_doc_versions and Vale to quality workflow
- Add make targets: devx-check-doc-versions, devx-vale

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

.vale/styles/config/vocabularies/devx/accept.txt

@@ -0,0 +1,38 @@
+devx
+Gitea
+ZITADEL
+OpenTofu
+Ansible
+Vaultwarden
+Nextcloud
+Vikunja
+Mattermost
+Prometheus
+Grafana
+Loki
+Alertmanager
+Promtail
+pyproject
+tofu
+act_runner
+actionlint
+hadolint
+git-cliff
+pre-commit
+semver
+changelog
+idempotent
+rootless
+OIDC
+SSO
+SAML
+LDAP
+pytest
+molecule
+ruff
+pyright
+bandit
+Vikunja
+oblachno
+Oblachno
+Bulgarian