Issue #3440375: Cut a 2.x

composer.json

diff.api.php

diff.info.yml

diff.install

phpcs.xml

phpstan-baseline.neon

phpstan.neon

src/Annotation/DiffLayoutBuilder.php

src/Annotation/FieldDiffBuilder.php

src/Controller/NodeRevisionController.php

src/Controller/PluginRevisionController.php

src/DiffBuilderManager.php

src/DiffEntityComparison.php

src/DiffEntityParser.php

src/DiffFormatter.php

src/DiffLayoutBase.php

src/DiffLayoutInterface.php

src/DiffLayoutManager.php

src/FieldDiffBuilderBase.php

src/FieldDiffBuilderInterface.php