feat(commands): add image asset layer commands

commands/index.ts

@@ -1,6 +1,17 @@
 export type { Command, CommandContext } from "./command";
-export { documentAddArtboardCommand, documentCommands } from "./document";
-export type { DocumentAddArtboardPayload } from "./document";
+export {
+  documentAddArtboardCommand,
+  documentAddAssetCommand,
+  documentAddImageLayerCommand,
+  documentCommands,
+  documentSetArtboardBoundsCommand,
+} from "./document";
+export type {
+  DocumentAddArtboardPayload,
+  DocumentAddAssetPayload,
+  DocumentAddImageLayerPayload,
+  DocumentSetArtboardBoundsPayload,
+} from "./document";
 export type { CommandDispatcher, Dispatch } from "./dispatcher";
 export type { CommandId, CommandPayloads } from "./payloads";
 export { createCommandDispatcher } from "./dispatcher";