feat(tabletop): inject proxy handlers from web app

packages/tabletop/src/index.ts

@@ -0,0 +1,12 @@
+export { PartView, PartMesh } from './partView.js';
+export { default as ErrorBoundary } from './ErrorBoundary.js';
+export { TabletopProvider, useTabletopHttp } from './provider.js';
+export type { TabletopHttp, AssetUrlFn, TraceImageFn } from './provider.js';
+export {
+  partDimensions,
+  spriteUvFromCrop,
+  fallbackShape,
+  traceToShape,
+  traceToUvBounds,
+} from './part.js';
+export { resolveAssetUrl, assetUrl, traceImage } from './http.js';