Add Go CDN and playground server

Build Core and Handles into in-memory CDN modules, add the marketing site and tutorial docs, and provide a SQLite-backed WebGPU playground with TypeScript tooling and profiling.

Amp-Thread-ID: https://ampcode.com/threads/T-01a02485-5574-707c-bff4-5668d83bee8a
Co-authored-by: Heaust Azure <heaust.azure@gmail.com>

core/lib.rs

@@ -219,6 +219,9 @@ impl Core {
             .as_ref()
             .is_some_and(|gpu| gpu.timestamp_queries);
         self.render.set_profiling(enabled && supported);
+        if enabled && supported {
+            self.data.borrow_mut().mark_dirty();
+        }
         supported
     }