Added platforms module

src/platforms/index.ts

@@ -0,0 +1,16 @@
+export {
+    PlatformType,
+} from "./platform-type";
+
+export {
+    PlatformUploader,
+
+    createPlatformUploader,
+} from "./platform-uploader";
+
+export {
+    GenericPlatformUploader,
+    GenericPlatformUploaderOptions,
+    KnownPlatformUploaderOptions,
+    GenericPlatformUploadRequest,
+} from "./generic-platform-uploader";