chore: Clean up and reorganize Bruno collection after rebuild

- Remove duplicate Get Admin Dashboard.bru (same as /admin route)
- Reorder sequence numbers for logical grouping
- Add missing body: none to GET requests
- Standardize folder path examples to /app/uploads
- Fix file formatting and add missing newlines

bruno/admin/Delete Ebook Folder.bru

@@ -1,7 +1,7 @@
 meta {
   name: Delete Ebook Folder
   type: http
-  seq: 10
+  seq: 3
 }
 
 delete {
@@ -51,4 +51,4 @@ docs {
   - Path normalization for matching
   - Supports both absolute paths and home directory (~) paths
   - Prevents deletion of non-existent folders
-}
+}