Added FBXLoader (#17967)

types/three/index.d.ts

@@ -14,6 +14,7 @@ export * from "./three-ddsloader";
 export * from "./three-editorcontrols";
 export * from "./three-effectcomposer";
 export * from "./three-examples";
+export * from "./three-fbxloader";
 export * from "./three-FirstPersonControls";
 export * from "./three-maskpass";
 export * from "./three-mtlloader";

types/three/three-fbxloader.d.ts

@@ -0,0 +1,14 @@
+// https://github.com/mrdoob/three.js/blob/master/examples/js/loaders/FBXLoader.js
+
+import {LoadingManager} from "./three-core";
+import {Group} from "./three-core";
+
+export class FBXLoader {
+
+    constructor(manager?: LoadingManager);
+    manager: LoadingManager;
+
+    load(url: string, onLoad: (group: Group) => void, onProgress?: (event: ProgressEvent) => void, onError?: (event: ErrorEvent) => void): void;
+    parse(FBXText: string, resourceDirectory: string) : Group;
+
+}