Single-object viewer POC (#14)

This commit implements a Sketchfab-style single-object viewer as a minimal
proof-of-concept.

### `@storyteller/studio-web`
This is a new package to house web components for interfacing with the
`@storyteller/studio` WASM library. It currently includes a single component,
`<sts-viewer />`, which is exported from `@storyteller/studio-web/viewer`.

### `react-frontend`
This is a new application intended as a proof-of-concept and testbed for React
interop with `@storyteller/studio-web`.

Web components are currently a little bit fiddly to use in a React application.
`react-frontend/src/app/studio-viewer.tsx` demonstrates how a React-idiomatic
component can be written as a thin wrapper around a web component, and
`react-frontend/src/app/app.tsx` demonstrates that wrapper component in use.

nx.json

@@ -51,6 +51,21 @@
       "linter": "none",
       "unitTestRunner": "none",
       "e2eTestRunner": "none"
+    },
+    "@nx/react": {
+      "application": {
+        "style": "scss",
+        "linter": "none",
+        "bundler": "vite",
+        "babel": true
+      },
+      "component": {
+        "style": "scss"
+      },
+      "library": {
+        "style": "scss",
+        "linter": "none"
+      }
     }
   }
 }