initializr: default useLargerTextScaleBool to true in generated theme.css

[liannacasper]

Motivation

• New projects generated by the Initializr should opt in to larger text scaling by default so apps start with accessible text sizing.

Description

• Injected a safe, idempotent useLargerTextScaleBool: true; into barebones/Kotlin theme.css when generating a project by adding ensureDefaultLargeTextScale and invoking it before buildThemeCss() in GeneratorModel.
• The injection looks for an existing useLargerTextScaleBool and leaves the CSS unchanged if present, otherwise it adds the constant inside an existing #Constants block or appends a new #Constants block.
• Added an assertion in GeneratorModelMatrixTest to verify barebones and Kotlin templates produce common/src/main/css/theme.css containing useLargerTextScaleBool: true;.
• Modified files: scripts/initializr/common/src/main/java/com/codename1/initializr/model/GeneratorModel.java and scripts/initializr/common/src/test/java/com/codename1/initializr/model/GeneratorModelMatrixTest.java.

Testing

• Attempted to run the matrix test with cd scripts/initializr/common && mvn -Dtest=GeneratorModelMatrixTest test but the environment failed to run Maven due to external resolution errors (Maven Central returned 403 for plugin resolution), so the test could not be executed here.
• An attempted run with JAVA_HOME set also failed because the Java 8 path was not available in this environment, so no local test run succeeded.

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Codex Task

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