Fix middle mouse button link behavior (#9632)

- Add check for middle mouse button (event.button === 1) in link click handler
- Middle mouse button clicks now properly open links in new tabs instead of current tab
- Fixes issue where MMB acted like LMB and caused duplicate tab opening
- Issue was present since version 0.83.0 and reported in 0.85.1

Co-authored-by: codegen-sh[bot] <131295404+codegen-sh[bot]@users.noreply.github.com>

app/hooks/useEditorClickHandlers.ts

@@ -64,7 +64,10 @@ export default function useEditorClickHandlers({ shareId }: Params) {
           return;
         }
 
-        if (!event || (!isModKey(event) && !event.shiftKey)) {
+        if (
+          !event ||
+          (!isModKey(event) && !event.shiftKey && event.button !== 1)
+        ) {
           history.push(navigateTo, { sidebarContext: "collections" }); // optimistic preference of "collections"
         } else {
           window.open(navigateTo, "_blank");