Description

before

$text.textHeightBehavior(
   const TextHeightBehavior(
      applyHeightToFirstAscent: false,
      applyHeightToLastDescent: false,
    ),
)

now

$text.chain
    ..textHeightBehavior.heightToFirstAscent(false),
    ..textHeightBehavior.heightToLastDescent(false),
)

Changes

• Create a utility for this TextHeightBehavior and TextLeadingDistribution
• Reorganize scalar_util_test.dart file

Review Checklist

• Testing: Have you tested your changes, including unit tests and integration tests for affected code?
• Breaking Changes: Does this change introduce breaking changes affecting existing code or users?
• Documentation Updates: Are all relevant documentation files (e.g. README, API docs) updated to reflect the changes in this PR?
• Website Updates: Is the website containing the updates you make on documentation?