feat: deploy ask TUI to ask.xn--2dk.xyz

- Add ttyd service for ask on port 7682
- Update haloy.yml with new domain and GEMINI_API_KEY
- Update Caddyfile to route ask.xn--2dk.xyz to ttyd
- Update Dockerfile to include ask binary
- Update README with ask section and schema files documentation

Dockerfile

@@ -26,7 +26,8 @@ ENV LANG=C.UTF-8 \
 WORKDIR /app
 
 COPY basedosdados.duckdb Caddyfile start.sh auth.py ./
-RUN chmod +x start.sh
+COPY ask/target/release/ask /app/ask
+RUN chmod +x start.sh /app/ask
 
 EXPOSE 8080