docs: restructure problem paths, change section display to groups, and improve documentation content

apps/docs/content/(03-hierarchical)/binary-search-tree/meta.ts

@@ -1,3 +1,3 @@
 import { defineMeta } from "blume";
 
-export default defineMeta({ title: "Binary Search Tree", order: 13, icon: "git-fork", display: "page" });
+export default defineMeta({ title: "Binary Search Tree", order: 13, icon: "git-fork", display: "group" });

apps/docs/content/(03-hierarchical)/heap-priority-queue/meta.ts

@@ -1,3 +1,3 @@
 import { defineMeta } from "blume";
 
-export default defineMeta({ title: "Heap / Priority Queue", order: 14, icon: "triangle", display: "page" });
+export default defineMeta({ title: "Heap / Priority Queue", order: 14, icon: "triangle", display: "group" });

apps/docs/content/(03-hierarchical)/tree-bfs/meta.ts

@@ -1,3 +1,3 @@
 import { defineMeta } from "blume";
 
-export default defineMeta({ title: "Tree BFS", order: 12, icon: "network", display: "page" });
+export default defineMeta({ title: "Tree BFS", order: 12, icon: "network", display: "group" });

apps/docs/content/(03-hierarchical)/tree-dfs/meta.ts

@@ -1,3 +1,3 @@
 import { defineMeta } from "blume";
 
-export default defineMeta({ title: "Tree DFS", order: 11, icon: "folder-tree", display: "page" });
+export default defineMeta({ title: "Tree DFS", order: 11, icon: "folder-tree", display: "group" });

apps/docs/content/(03-hierarchical)/trie/meta.ts

@@ -1,3 +1,3 @@
 import { defineMeta } from "blume";
 
-export default defineMeta({ title: "Trie", order: 15, icon: "spell-check", display: "page" });
+export default defineMeta({ title: "Trie", order: 15, icon: "spell-check", display: "group" });