Docs guide ja rest update [ci skip]

fixes #6682

close #6680

docs-guide-ja-output updates [ci skip]

Fixes #6678: `yii\behaviors\SluggableBehavior` will generate a new slug only when the slug attribute is empty or the source attribute is changed

Docs guide ja rest controllers [ci skip]

Docs guide ja rest resources [ci skip]

Update intro-yii.md in guide-es [skip ci]

Update BaseArrayHelper.php

[skip ci] Internal es

Update Guide ES [skip ci]

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