fix: map vtable-sheet object data edits by columns

[fangsmile]

Summary

• Fix WorkSheet object-row writes when sheet columns are configured
• Preserve object-row values in getCopiedData by exporting leaf column fields instead of empty arrays
• Add a dedicated issue [Bug] VtableSheet表格在sheet中配置了columns后会出现表格数据修改后映射不到对应字段上 #5152 demo and patch changeset

Issue

Fixes #5152

Demo

• packages/vtable-sheet/examples/sheet/issue-5152-columns-edit-mapping.ts
• Menu entry: issue-5152-columns-edit-mapping
• Flow: set values through WorkSheet.setCellValue, then check object data and copied data

Verification

• Demo result: PASS | row fields planningCode/owner.name/amount.budget are updated and copied data has expected values
• Chrome DevTools console: no error messages
• node ../../common/scripts/install-run-rushx.js compile passed in packages/vtable-sheet
• git diff --check passed
• commit hook eslint/prettier/commitlint passed