feat:Optimize Enter operation

[q200892907]

Modify the operation of the Enter key for list type blocks. If it is empty, perform the Shift+Tab operation until it returns to no format.

2024-01-13.10.11.02.mov

[LucasXu0]

@q200892907 Please update the tests.

[q200892907]

@q200892907 Please update the tests.

add tests @LucasXu0

[LucasXu0]

@q200892907 Actually, what I meant was fixing the existing tests that also failed.

00:31 +519 -2: /Users/lucas.xu/Desktop/development/appflowy-editor/test/new/service/shortcuts/command_shortcut_events/enter_without_shift_in_text_node_handler_test.dart: enter_without_shift_in_text_node_handler.dart Presses enter key in bulleted list indented [E]
  Test failed. See exception logs above.
  The test description was: Presses enter key in bulleted list indented


To run this test again: /Users/lucas.xu/Desktop/flutter/bin/cache/dart-sdk/bin/dart test /Users/lucas.xu/Desktop/development/appflowy-editor/test/new/service/shortcuts/command_shortcut_events/enter_without_shift_in_text_node_handler_test.dart -p vm --plain-name 'enter_without_shift_in_text_node_handler.dart Presses enter key in bulleted list indented'
00:50 +777 -2: Some tests failed.

[q200892907]

@LucasXu0 update test

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (3d373be) 76.47% compared to head (c64dfb4) 76.49%.
Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #673      +/-   ##
==========================================
+ Coverage   76.47%   76.49%   +0.02%     
==========================================
  Files         295      295              
  Lines       13046    13076      +30     
==========================================
+ Hits         9977    10003      +26     
- Misses       3069     3073       +4     

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