fix: Support Excalidraw inside scrollable container (#3018)

* refactor: remove position fixed from excalidraw container, modal and stats

* remove unused css

* remove position fixed from toast and scroll to content

* Make excal interactable by fixing offsets and set popover as fixed since position needs to be calculate from viewport  top

* Assign 200px less than height of Excalidraw to the selected shapes actions o UI doesn't overflow

* update changelog, readme and package.json

src/components/Modal.tsx

@@ -54,7 +54,7 @@ const useBodyRoot = () => {
       ?.classList.contains("Appearance_dark");
     const div = document.createElement("div");
 
-    div.classList.add("excalidraw");
+    div.classList.add("excalidraw", "excalidraw-modal-container");
 
     if (isDarkTheme) {
       div.classList.add("Appearance_dark");