OpenWorker: initial import

Imported from andrewyng/aisuite@1b4bbf303e
(contents of its platform/ directory, hoisted to the repo root).
Development history prior to this commit lives in that repository.

Co-authored-by: Devika <devikaverma11@gmail.com>

surfaces/gui/src/tailwind.css

@@ -0,0 +1,5 @@
+/* Tailwind layer — utilities for the mock-parity restyle. Imported before styles.css so the
+   app's existing base rules still win on surfaces not yet ported to utility classes. */
+@tailwind base;
+@tailwind components;
+@tailwind utilities;