revert(ListView): revert grid layout

[ArgoZhang]

revert grid layout

Summary of the changes (Less than 80 chars)

简单描述你更改了什么, 不超过80个字符；如果有关联 Issue 请在下方填写相关编号

Description

fixes #5423

Regression?

• Yes
• No

[If yes, specify the version the behavior has regressed from]

[是否影响老版本]

Risk

• High
• Medium
• Low

[Justify the selection above]

Verification

• Manual (required)
• Automated

Packaging changes reviewed?

• Yes
• No
• N/A

☑️ Self Check before Merge

⚠️ Please check all items below before review. ⚠️

• Doc is updated/provided or not needed
• Demo is updated/provided or not needed
• Merge the latest code from the main branch

Summary by Sourcery

Reverts the grid layout of the ListView component and adjusts the styling to improve the visual presentation.

Bug Fixes:

• Reverted the grid layout for the ListView component, addressing issue revert(ListView): revert grid layout #5423.

Enhancements:

• Improved the styling of the ListView component by adjusting padding and margins for better visual presentation.

[sourcery-ai]

Reviewer's Guide by Sourcery

Reverted the ListView component from a grid layout back to a flex layout to address issue #5423.

Updated class diagram for ListView component

classDiagram
    class ListView {
        -RenderFragment RenderItem
        -RenderFragment RenderGroupItem
    }

    ListView ..> RenderFragment : uses
    note for ListView "RenderGroup removed, RenderItem and RenderGroupItem updated to reflect flex layout"

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File-Level Changes

Change	Details	Files
Reverted the grid layout implementation for the ListView component, restoring the original flex layout.	Replaced the grid layout with a flex layout in the ListView body. Adjusted the styling for list items to use margins instead of gaps. Modified the accordion body to use flex layout for item arrangement. Updated the ListView samples to remove the lv-demo-img class and add a margin to the images.	src/BootstrapBlazor/Components/ListView/ListView.razor src/BootstrapBlazor/Components/ListView/ListView.razor.scss src/BootstrapBlazor.Server/Components/Samples/ListViews.razor src/BootstrapBlazor/wwwroot/scss/theme/bootstrapblazor.scss src/BootstrapBlazor.Server/Components/Samples/ListViews.razor.css src/BootstrapBlazor/Components/ListView/ListView.razor.cs

Assessment against linked issues

Issue	Objective	Addressed	Explanation
#5423	Revert the grid layout in the ListView component.	✅

Possibly linked issues

• revert(ListView): revert grid layout #5423: The PR implements the issue by reverting the grid layout in ListView.
• revert(ListView): revert grid layout #5423: The PR reverts the changes introduced in issue revert(ListView): revert grid layout #5423, changing the ListView layout from grid back to a previous implementation.
• revert(ListView): revert grid layout #5423: The PR fixes the issue mentioned where the scrollbar is not visible after collapsing the sidebar.

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[sourcery-ai]

Hey @ArgoZhang - I've reviewed your changes - here's some feedback:

Overall Comments:

• Consider reverting the renaming of gap to margin in the scss file to keep the naming consistent with the grid layout.
• The demo images now have a margin below them, which might not be desirable - consider removing it.

Here's what I looked at during the review

• 🟢 General issues: all looks good
• 🟢 Security: all looks good
• 🟢 Testing: all looks good
• 🟢 Complexity: all looks good
• 🟢 Documentation: all looks good

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.87%. Comparing base (f3463e5) to head (c43f2b8).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5424      +/-   ##
==========================================
- Coverage   99.87%   99.87%   -0.01%     
==========================================
  Files         646      646              
  Lines       29406    29387      -19     
  Branches     4133     4135       +2     
==========================================
- Hits        29368    29349      -19     
  Misses         38       38              

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