feat: canvas search (#8438)

Co-authored-by: dwelle <5153846+dwelle@users.noreply.github.com>

packages/excalidraw/constants.ts

@@ -113,6 +113,7 @@ export const ENV = {
 export const CLASSES = {
   SHAPE_ACTIONS_MENU: "App-menu__left",
   ZOOM_ACTIONS: "zoom-actions",
+  SEARCH_MENU_INPUT_WRAPPER: "layer-ui__search-inputWrapper",
 };
 
 /**
@@ -382,6 +383,10 @@ export const DEFAULT_SIDEBAR = {
   defaultTab: LIBRARY_SIDEBAR_TAB,
 } as const;
 
+export const SEARCH_SIDEBAR = {
+  name: "search",
+};
+
 export const LIBRARY_DISABLED_TYPES = new Set([
   "iframe",
   "embeddable",