feat(editor): unify block props api (#10888)

Closes: [BS-2707](https://linear.app/affine-design/issue/BS-2707/统一使用props获取和更新block-prop)

blocksuite/framework/block-std/src/gfx/model/gfx-block-model.ts

@@ -63,6 +63,42 @@ export class GfxBlockElementModel<
 
   connectable = true;
 
+  get xywh() {
+    return this.props.xywh;
+  }
+
+  get xywh$() {
+    return this.props.xywh$;
+  }
+
+  set xywh(xywh: SerializedXYWH) {
+    this.props.xywh = xywh;
+  }
+
+  get index() {
+    return this.props.index;
+  }
+
+  get index$() {
+    return this.props.index$;
+  }
+
+  set index(index: string) {
+    this.props.index = index;
+  }
+
+  get lockedBySelf(): boolean | undefined {
+    return this.props.lockedBySelf;
+  }
+
+  get lockedBySelf$() {
+    return this.props.lockedBySelf$;
+  }
+
+  set lockedBySelf(lockedBySelf: boolean | undefined) {
+    this.props.lockedBySelf = lockedBySelf;
+  }
+
   /**
    * Defines the extension of the response area beyond the element's bounding box.
    * This tuple specifies the horizontal and vertical margins to be added to the element's [x, y, width, height].

blocksuite/framework/block-std/src/gfx/model/surface/surface-model.ts

@@ -109,6 +109,10 @@ export class SurfaceBlockModel extends BlockModel<SurfaceBlockProps> {
     return models;
   }
 
+  get elements() {
+    return this.props.elements;
+  }
+
   get localElementModels() {
     return this.localElements;
   }