feat(module:transfer): support multiple row selection with Shift key

[F-JJTH]

PR Checklist

Please check if your PR fulfills the following requirements:

• [ x] The commit message follows our guidelines: https://github.com/NG-ZORRO/ng-zorro-antd/blob/master/CONTRIBUTING.md#commit
• [x ] Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• Bugfix
• [ x] Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Documentation content changes
• Application (the showcase website) / infrastructure changes
• Other... Please describe:

What is the current behavior?

It is not possible to select multiple row by using keyboard key SHIFT

Issue Number: N/A

What is the new behavior?

The new behavior allow to select multiple row by using the keyboard key SHIFT

Does this PR introduce a breaking change?

• Yes
• [ x] No

Other information

ANT DESIGN support this feature in their React component: https://ant.design/components/transfer

[zorro-bot]

This preview will be available after the AzureCI is passed.

[codecov]

Codecov Report

Attention: Patch coverage is 86.95652% with 3 lines in your changes missing coverage. Please review.

Project coverage is 91.99%. Comparing base (c91767c) to head (9044236).
Report is 14 commits behind head on master.

Files with missing lines	Patch %	Lines
components/transfer/transfer.component.ts	86.95%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #9092      +/-   ##
==========================================
- Coverage   92.01%   91.99%   -0.02%     
==========================================
  Files         564      564              
  Lines       20025    20047      +22     
  Branches     3106     3113       +7     
==========================================
+ Hits        18426    18443      +17     
- Misses       1261     1265       +4     
- Partials      338      339       +1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[Copilot]

Pull Request Overview

This PR introduces a feature that enables multiple row selection via the Shift key in the transfer component. Key changes include:

• Addition of a new test verifying multi-select behavior when holding the Shift key.
• Integration of HostListener decorators to track Shift key state and update selection logic in the transfer component.
• Minor formatting improvements in test and component code for consistency.

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
components/transfer/transfer.spec.ts	Added test case for Shift key multi-selection and updated test configuration formatting
components/transfer/transfer.component.ts	Integrated Shift key event handling via HostListeners and updated selection logic using dynamic indexing

Comments suppressed due to low confidence (2)

components/transfer/transfer.spec.ts:211

• [nitpick] Consider renaming the test description to 'should toggle checkbox selection via shift key' for improved clarity.

it('should be checkboxes are toggle select via shift key', () => {

components/transfer/transfer.component.ts:278

• [nitpick] Consider assigning the property key to a separate variable (e.g. 'const lastIndexKey = direction === 'left' ? 'lastLeftCheckedIndex' : 'lastRightCheckedIndex';') to improve readability.

const lastCheckedIndex = this[direction === 'left' ? 'lastLeftCheckedIndex' : 'lastRightCheckedIndex'] ?? -1;

[Laffery]

LGTM