feat(integration): add docs/visio logos, theme.css, and nginx updates

Add SVG logos for docs and visio apps. Update drive, mail, people logos.
Add theme.css served at /api/v2/theme.css for La Suite frontend theming.
Update nginx to serve theme endpoint and tighten cache headers.
Update Dockerfile to include new static assets.

gaufre.js

@@ -38,6 +38,7 @@
       label:                'O Estúdio',
       closeLabel:           'Fechar',
       newWindowLabelSuffix: ' · nova janela',
+      fontFamily:           'Ysabeau Variable, Inter, sans-serif',
     }]);
     widgetReady = true;
   };