fix: add type information to blockly options (google#6283)

* fix: add type information to blockly options

* chore: format

* chore: remove erroneous comment

core/blockly_options.ts

@@ -15,11 +15,66 @@
 import * as goog from '../closure/goog/goog.js';
 goog.declareModuleId('Blockly.BlocklyOptions');
 
+import {Theme} from './theme.js';
+import {Workspace} from './workspace.js';
+
 
 /**
  * Blockly options.
- * This interface is further described in
- * `typings/parts/blockly-interfaces.d.ts`.
  * @alias Blockly.BlocklyOptions
  */
-export interface BlocklyOptions {}
+export interface BlocklyOptions {
+  collapse?: boolean;
+  comments?: boolean;
+  cs?: boolean;
+  disable?: boolean;
+  grid?: GridOptions;
+  horizontalLayout?: boolean;
+  maxBlocks?: number;
+  maxInstances?: {[blockType: string]: number};
+  media?: string;
+  move?: MoveOptions;
+  oneBasedIndex?: boolean;
+  readOnly?: boolean;
+  renderer?: string;
+  rendererOverrides?: {[rendererConstant: string]: any};
+  rtl?: boolean;
+  scrollbars?: ScrollbarOptions|boolean;
+  sounds?: boolean;
+  theme?: Theme;
+  toolbox?: string|object|Element;
+  toolboxPosition?: string;
+  trashcan?: boolean;
+  maxTrashcanContents?: boolean;
+  plugins?: object;
+  zoom?: ZoomOptions;
+  parentWorkspace?: Workspace;
+}
+
+export interface GridOptions {
+  colour?: string;
+  length?: number;
+  snap?: boolean;
+  spacing?: number;
+}
+
+export interface MoveOptions {
+  drag?: boolean;
+  scrollbars?: boolean|ScrollbarOptions;
+  wheel?: boolean;
+}
+
+export interface ScrollbarOptions {
+  horizontal?: boolean;
+  vertical?: boolean;
+}
+
+export interface ZoomOptions {
+  controls?: boolean;
+  maxScale?: number;
+  minScale?: number;
+  pinch?: boolean;
+  scaleSpeed?: number;
+  startScale?: number;
+  wheel?: boolean;
+}