feat: Implement Keycloak authentication and a basic CMS

Integrates Keycloak for secure administrator authentication using Arctic.
Introduces a full CMS dashboard for managing CV content, supporting multi-language editing for profile, experience, and education sections.

Refactors application routes for modularity and adds initial unit tests for database queries.

Also includes minor UI/UX refinements, animation setup, and local Keycloak docker-compose configuration.

Fixes:
- Corrected KeyCloak import.
- Restored missing getEducation function.
- Ensured proper HTTP redirects.
- Fixed PKCE code verifier length.

package.json

@@ -6,8 +6,10 @@
     "dev": "bun run --watch src/index.ts"
   },
   "dependencies": {
+    "@elysiajs/cookie": "^0.8.0",
     "@elysiajs/html": "^1.4.0",
     "@kitajs/ts-html-plugin": "^4.1.3",
+    "arctic": "^3.7.0",
     "autoprefixer": "^10.4.22",
     "elysia": "^1.4.16",
     "postcss": "^8.5.6",