build: enable consistent type imports eslint rule (#7992)

* build: enable consistent type imports eslint rule

* change to warn

* fix the warning in example and excalidraw-app

* fix packages

* enable type annotations and throw error for the rule

packages/excalidraw/groups.ts

@@ -1,4 +1,4 @@
-import {
+import type {
   GroupId,
   ExcalidrawElement,
   NonDeleted,
@@ -6,7 +6,7 @@ import {
   ElementsMapOrArray,
   ElementsMap,
 } from "./element/types";
-import {
+import type {
   AppClassProperties,
   AppState,
   InteractiveCanvasAppState,
@@ -14,7 +14,7 @@ import {
 import { getSelectedElements } from "./scene";
 import { getBoundTextElement } from "./element/textElement";
 import { makeNextSelectedElementIds } from "./scene/selection";
-import { Mutable } from "./utility-types";
+import type { Mutable } from "./utility-types";
 
 export const selectGroup = (
   groupId: GroupId,