feat(core): Add Bun and Deno runtime support, unify core loader, unix-socket support and cross-runtime streaming/tests

ts/core_node/request.ts

@@ -147,6 +147,12 @@ export class CoreRequest extends AbstractCoreRequest<
         this.options.requestBody.pipe(request).on('finish', () => {
           request.end();
         });
+      } else if (this.options.requestBody instanceof ReadableStream) {
+        // Convert web ReadableStream to Node.js Readable stream
+        const nodeStream = plugins.stream.Readable.fromWeb(this.options.requestBody as any);
+        nodeStream.pipe(request).on('finish', () => {
+          request.end();
+        });
       } else {
         // Write body as-is - caller is responsible for serialization
         const bodyData =