add Image source imageSmoothing option

Add Image smoothing checkbox to example

Test imageSmoothing option

src/ol/source/ImageStatic.js

@@ -19,6 +19,7 @@ import {get as getProjection} from '../proj.js';
  * @property {import("../extent.js").Extent} [imageExtent] Extent of the image in map coordinates.
  * This is the [left, bottom, right, top] map coordinates of your image.
  * @property {import("../Image.js").LoadFunction} [imageLoadFunction] Optional function to load an image given a URL.
+ * @property {boolean} [imageSmoothing=true] Enable image smoothing.
  * @property {import("../proj.js").ProjectionLike} [projection] Projection. Default is the view projection.
  * @property {import("../size.js").Size} [imageSize] Size of the image in pixels. Usually the image size is auto-detected, so this
  * only needs to be set if auto-detection fails for some reason.
@@ -45,6 +46,7 @@ class Static extends ImageSource {
 
     super({
       attributions: options.attributions,
+      imageSmoothing: options.imageSmoothing,
       projection: getProjection(options.projection),
     });