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/components/DarkModeToggle.tsx

@@ -3,7 +3,7 @@ import "./ToolIcon.scss";
 import { t } from "../i18n";
 import { ToolButton } from "./ToolButton";
 import { THEME } from "../constants";
-import { Theme } from "../element/types";
+import type { Theme } from "../element/types";
 
 // We chose to use only explicit toggle and not a third option for system value,
 // but this could be added in the future.