feat: complete Syndarix rebranding from PragmaStack

- Update PROJECT_NAME to Syndarix in backend config
- Update all frontend components with Syndarix branding
- Replace all GitHub URLs with Gitea Syndarix repo URLs
- Update metadata, headers, footers with new branding
- Update tests to match new URLs
- Update E2E tests for new repo references
- Preserve "Built on PragmaStack" attribution in docs

Closes #13

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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

frontend/src/components/home/AnimatedTerminal.tsx

@@ -14,8 +14,8 @@ import { Link } from '@/lib/i18n/routing';
 
 const commands = [
   { text: '# Clone the repository', delay: 0 },
-  { text: '$ git clone https://github.com/your-org/fast-next-template.git', delay: 800 },
-  { text: '$ cd fast-next-template', delay: 1600 },
+  { text: '$ git clone https://gitea.pragmazest.com/cardosofelipe/syndarix.git', delay: 800 },
+  { text: '$ cd syndarix', delay: 1600 },
   { text: '', delay: 2200 },
   { text: '# Start with Docker (one command)', delay: 2400 },
   { text: '$ docker-compose up', delay: 3200 },