WRQ-27436: Added public classes to expand size of title and content in Alert

[vJIYEv]

Checklist

• [x] I have read and understand the contribution guide
• [x] A CHANGELOG entry is included
• [x] At least one test case is included for this feature or bug fix
• [x] Documentation was added or is not needed
• [ ] This is an API breaking change

Issue Resolved / Feature Added

We decided to provide a public class to expand size of title and content in Alert so that full text can be shown wider on the screen.

Resolution

I added public classes to Alert.

• alert
• fullscreen
• title
• content

Title and content width can be expanded using these public classes.

This PR is for sandstone 2.7 and copied from https://github.com/enactjs/sandstone/pull/1652

Additional Considerations

Links

WRQ-27436

Comments

Enact-DCO-1.0-Signed-off-by: Jiye Kim (jiye.kim@lge.com)

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 80.52%. Comparing base (5c69254) to head (3b583df). Report is 1 commits behind head on release/2.7.x.develop.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## release/2.7.x.develop #1664 +/- ## ====================================================== Coverage 80.52% 80.52% ====================================================== Files 142 142 Lines 6497 6497 Branches 1919 1919 ====================================================== Hits 5232 5232 Misses 963 963 Partials 302 302 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.