chore: convert navigation controller to typescript (#41)

* chore: convert navigation_controller to ts

* chore: format

* chore: more lint, format, and ts cleanup

* chore: fix more warnings

* feat: fix auto-created properties and methods

* chore: clean up some imports

* chore: respond to pr feedback

Author: rachel-fenichel

src/index.ts

@@ -5,7 +5,6 @@
  */
 
 import * as Blockly from 'blockly/core';
-// @ts-expect-error No types in js file
 import {NavigationController} from './navigation_controller';
 import {installCursor} from './line_cursor';