fix: cyrillic fonts, dev certs, page head, and ru-text typography (#67)

🤖 PR generated for branch `fix/cyrillic-fonts-dev-certs-and-page-head`.

### Changes Summary
- **Fonts**: Add Cyrillic glyph subsets for Lato, EB Garamond, and Fira
Code.
- **Dev**: Support remote Root CA and encrypted dev CA key in
`.env.dev`.
- **UI & Kits**: Add size variant to `Breadcrumbs` component and enlarge
`PageHead` breadcrumbs with tuned collapse scroll threshold.
- **ESLint**: Add `no-hanging-particles` i18n & markdown typography rule
with auto-fixer.
- **Content & i18n**: Apply `ru-text` editorial and typography polish
(em dashes, number ranges, «ё» restoration, non-breaking spaces) across
`services/www` and `services/docs`.

services/docs/content/en/quetza/concepts/_index.md

@@ -3,7 +3,7 @@ title: Concepts
 weight: 4
 ---
 
-**Quetza** concepts explain the _Why_ and _How_ behind the framework's design. These documents cover the underlying philosophy and architectural decisions.
+**Quetza** concepts explain the _Why_ and _How_ behind the framework's design. These documents cover the underlying philosophy and architectural decisions.
 
 ## Key Topics