Draggable nested folder

[LucasXu0]

Feature Preview

---

PR Checklist

• My code adheres to the AppFlowy Style Guide
• I've listed at least one issue that this PR fixes in the description above.
• I've added a test(s) to validate changes in this PR, or this PR only contains semantic changes.
• All existing tests are passing.

[codecov]

Codecov Report

Merging #14 (9692c8e) into main (eb77346) will decrease coverage by 1.71%.
The diff coverage is 88.18%.

@@            Coverage Diff             @@
##             main      #14      +/-   ##
==========================================
- Coverage   68.84%   67.13%   -1.71%     
==========================================
  Files         430      443      +13     
  Lines       20512    21089     +577     
==========================================
+ Hits        14121    14158      +37     
- Misses       6391     6931     +540     

Flag	Coverage Δ
appflowy_flutter_integrateion_test	63.91% <88.18%> (-1.90%)	⬇️
appflowy_flutter_unit_test	12.88% <4.28%> (-0.17%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files Changed	Coverage Δ
...tend/appflowy_flutter/lib/core/config/kv_keys.dart	0.00% <ø> (ø)
...ce/presentation/home/menu/app/section/section.dart	0.00% <ø> (-84.38%)	⬇️
...tion/home/menu/sidebar/folder/personal_folder.dart	67.50% <67.50%> (ø)
.../presentation/home/menu/sidebar/sidebar_trash.dart	77.27% <77.27%> (ø)
...e/presentation/home/menu/sidebar/sidebar_user.dart	81.66% <81.66%> (ø)
...ntation/widgets/draggable_item/draggable_item.dart	82.05% <82.05%> (ø)
.../presentation/home/menu/view/view_action_type.dart	86.95% <86.95%> (ø)
...esentation/home/menu/view/draggable_view_item.dart	87.50% <87.50%> (ø)
...tter/lib/workspace/application/view/view_bloc.dart	87.75% <87.71%> (-0.89%)	⬇️
...esentation/home/menu/sidebar/sidebar_top_menu.dart	88.46% <88.46%> (ø)
... and 13 more

... and 17 files with indirect coverage changes

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more