feat: add crowfoot to arrowheads (#8942)

* crowfoot many

* crowfoot one

* one or many

* add icons for crowfoot

* add crowfoot icons

* adjust arrowhead selection popover

* make options collapsible

* swap triangle and bar

* switch to radix popover

* put triangle outline in the first row

* align shadow with new design spec

* remove unused flag

* swap order

* tweak labels

* handle shift+tab

---------

Co-authored-by: dwelle <5153846+dwelle@users.noreply.github.com>
Co-authored-by: Jakub Królak <108676707+j-krolak@users.noreply.github.com>

packages/excalidraw/components/Stats/Collapsible.tsx

@@ -9,6 +9,7 @@ interface CollapsibleProps {
   open: boolean;
   openTrigger: () => void;
   children: React.ReactNode;
+  className?: string;
 }
 
 const Collapsible = ({
@@ -16,6 +17,7 @@ const Collapsible = ({
   open,
   openTrigger,
   children,
+  className,
 }: CollapsibleProps) => {
   return (
     <>
@@ -26,6 +28,7 @@ const Collapsible = ({
           justifyContent: "space-between",
           alignItems: "center",
         }}
+        className={className}
         onClick={openTrigger}
       >
         {label}