add image asset handler plugin

doric-demo/src/ImageDemo.ts

@@ -1,8 +1,11 @@
 import { Group, Panel, coordinator, text, gravity, Color, LayoutSpec, log, vlayout, scroller, layoutConfig, image, ScaleType, Image } from "doric";
 import { colors, label } from "./utils";
 import { img_base64 } from "./image_base64";
+
 const imageUrl = 'https://img.zcool.cn/community/01e75b5da933daa801209e1ffa4649.jpg@1280w_1l_2o_100sh.jpg'
 
+import logo from "./images/logo_w.png"
+
 @Entry
 class ImageDemo extends Panel {
     build(rootView: Group): void {
@@ -124,7 +127,16 @@ class ImageDemo extends Panel {
                             right: 0.149,
                             bottom: 0
                         }
-                    })
+                    }),
+                    label('Asset Image'),
+                    image({
+                        imageBase64: logo,
+                        width: 235,
+                        height: 235,
+                        backgroundColor: Color.BLACK,
+                        scaleType: ScaleType.ScaleAspectFill,
+                        layoutConfig: layoutConfig().just(),
+                    }),
                 ],
                 {
                     layoutConfig: layoutConfig().most().configHeight(LayoutSpec.FIT),

doric-demo/src/image.d.ts

@@ -0,0 +1,4 @@
+declare module '*.png' {
+    const value: any;
+    export default value;
+}