doc(MultiSelect): update OnEditCallback sample code

[ArgoZhang]

update OnEditCallback sample code

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 #5100 #5067

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

Documentation:

• Update the MultiSelect component documentation with an example of how to use the OnEditCallback parameter.

[sourcery-ai]

Reviewer's Guide by Sourcery

This PR updates the OnEditCallback sample code in the MultiSelects component to demonstrate the functionality of adding new items to the list when the user types in a value that is not already present. It also removes unused loggers and variables.

Sequence diagram for MultiSelect OnEditCallback flow

sequenceDiagram
    actor User
    participant MS as MultiSelect
    participant CB as OnEditCallback
    participant Items as EditableItems

    User->>MS: Enter new value
    MS->>CB: Call OnEditCallback(value)
    CB->>Items: Search for existing item
    alt Item exists
        Items-->>CB: Return existing item
    else Item does not exist
        CB->>Items: Create new item
        Items-->>CB: Return new item
    end
    CB-->>MS: Return selected item
    MS-->>User: Update display

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File-Level Changes

Change	Details	Files
Updated the MultiSelects component to use the OnEditCallback parameter.	Added OnEditCallback parameter to the MultiSelect component. Implemented the OnEditCallback function to handle new items. Bound the MultiSelect component's value to a new variable _editString. Added a Display component to show the selected value. Removed unused loggers and variables from the component. Updated the sample code to use the EditSubmitKey.Enter value for the EditSubmitKey parameter. Added a new SelectedItem to the EditableItems list if the entered value doesn't exist. Set the maximum number of selectable items to 2 using the Max parameter.	src/BootstrapBlazor.Server/Components/Samples/MultiSelects.razor src/BootstrapBlazor.Server/Components/Samples/MultiSelects.razor.cs
Removed unused loggers and variables.	Removed the OptionLogger from the MultiSelects.razor component. Removed the OptionLogger variable from the MultiSelects.razor.cs file.	src/BootstrapBlazor.Server/Components/Samples/MultiSelects.razor src/BootstrapBlazor.Server/Components/Samples/MultiSelects.razor.cs

Assessment against linked issues

Issue	Objective	Addressed	Explanation
#5100	Update the OnEditCallback sample code for MultiSelect component	✅

Possibly linked issues

• doc(MultiSelect): update OnEditCallback sample code #5100: The PR updates the OnEditCallback sample code as requested in the issue.
• doc(MultiSelect): update OnEditCallback sample code #5100: The PR fixes the MultiSelect update issue by updating the OnEditCallback sample code to correctly handle value updates.
• doc(MultiSelect): update OnEditCallback sample code #5100: The PR fixes the issue by updating the OnEditCallback sample code to handle item creation and selection correctly.

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[sourcery-ai]

Hey @ArgoZhang - I've reviewed your changes and they look great!

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 100.00%. Comparing base (ae7d91b) to head (1f0b7d6).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main     #5101   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          633       633           
  Lines        28136     28136           
  Branches      4036      4036           
=========================================
  Hits         28136     28136           

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