Field Populator: Add preview step [MAPS-193]

[joaquincasal]

Purpose

Adding a new step in the Dialog of the app to compare the valus for the source and one target locale.

Approach

This PR:

• Changes the way we update entries, from using sdk.entry to sdk.cma.entry. This will allow to update entries referenced in a future PR.
• Adds a new PreviewStep to the Dialog that shows values for the source and target locales.
• Shows a diff between the source and target values, using colored backgrounds.

For the rich text fields, the diff is shown keeping the formatting from the field, which required separate logic for the diff.

Testing steps

Automated tests were updated and added.

Breaking Changes

N/A

Dependencies and/or References

Four libraries were added for the diff logic

Deployment

N/A

Screen.Recording.2026-02-03.at.09.48.34.mov

[wiz-inc-38d59fb8d7]

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[joaquincasal]

This looks quite different from the designs because it will change in the next PR, it will require the updateEntry function to return different information (info from other updated entries)