feat: Bind keyboard events to the current excalidraw container and add handleKeyboardGlobally prop to allow host to bind to document (#3430)

* fix: Bind keyboard events to excalidraw container

* fix cases around blurring

* fix modal rendering so keyboard shortcuts work on modal as well

* Revert "fix modal rendering so keyboard shortcuts work on modal as well"

This reverts commit 2c8ec6be8e.

* Attach keyboard event in react way so we need not handle portals separately (modals)

* dnt propagate esc event when modal shown

* focus the container when help dialog closed with shift+?

* focus the help icon when help dialog on close triggered

* move focusNearestTabbableParent to util

* rename util to focusNearestParent and remove outline from excal and modal

* Add prop bindKeyGlobally to decide if keyboard events should be binded to document and allow it in excal app, revert tests

* fix

* focus container after installing library, reset library and closing error dialog

* fix tests and create util to focus container

* Add excalidraw-container class to focus on the container

* pass focus container to library to focus current instance of excal

* update docs

* remove util as it wont be used anywhere

* fix propagation not being stopped for React keyboard handling

* tweak reamde

Co-authored-by: David Luzar <luzar.david@gmail.com>

* tweak changelog

* rename prop to handleKeyboardGlobally

Co-authored-by: dwelle <luzar.david@gmail.com>

src/components/Modal.tsx

@@ -22,6 +22,7 @@ export const Modal = (props: {
   const handleKeydown = (event: React.KeyboardEvent) => {
     if (event.key === KEYS.ESCAPE) {
       event.nativeEvent.stopImmediatePropagation();
+      event.stopPropagation();
       props.onCloseRequest();
     }
   };
@@ -38,6 +39,7 @@ export const Modal = (props: {
       <div
         className="Modal__content"
         style={{ "--max-width": `${props.maxWidth}px` }}
+        tabIndex={0}
       >
         {props.children}
       </div>