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/www/package.json

@@ -13,7 +13,7 @@
     "build:all": "pnpm run build:en && pnpm run build:ru",
     "build:analyze": "RSDOCTOR=true rsbuild build",
     "preview": "rsbuild preview",
-    "lint": "eslint src --max-warnings 0",
+    "lint": "eslint src \"content/**/*.mdx\" --max-warnings 0",
     "format": "prettier --write .",
     "typecheck": "tsc --noEmit",
     "test": "vitest run",