docs: rewrite README to describe ConceptSketch project (closes #4)

src/components/Graph.tsx

@@ -264,7 +264,12 @@ const Graph = forwardRef<GraphHandle, { setGraphPath: React.Dispatch<React.SetSt
       title: selectedNodeName,
       key: pathSegmentId,
       onClick: () => {
-        setGraphsPath(prev => prev.slice(0, prev.findIndex(p => p.key === pathSegmentId) + 1));
+        const index = graphsPath.findIndex(p => p.key === pathSegmentId);
+        setGraphsPath(prev => {
+          prev.splice(index + 1);
+
+          return [...prev];
+        });
         selectGraphId(pathSegmentId);
       }
     } as BreadcrumbItemType;