Initial public release: DWG/DXF 2D viewer sample

Standalone Vite sample composing acadrust-dwg WASM, dxf-parser, and Viewer2D.

src/viewer2d/shims.d.ts

@@ -0,0 +1,20 @@
+declare module 'dxf-parser' {
+  export default class DxfParser {
+    parseSync(text: string): unknown;
+    registerEntityHandler(handler: { ForEntityName: string; parseEntity: (...args: unknown[]) => unknown }): void;
+  }
+}
+
+declare module 'opentype.js' {
+  export function parse(buffer: ArrayBuffer): unknown;
+}
+
+declare module '*.wasm?url' {
+  const url: string;
+  export default url;
+}
+
+declare module '*.wasm' {
+  const url: string;
+  export default url;
+}