- small changes to docs/guide-ja/start-forms.md [ci skip]
- docs/guide-ja/start-databases.md added [ci skip]

close #5750

close #5751

Fixes #5735: Added `yii\bootstrap\Tabs::renderTabContent` to support manually rendering tab contents

Fixes #5708

New Chinese translations

[skip ci] New file Ukrainian translation

update caching-data.md [skip ci]

[ci skip] Update structure-views.md

[ci skip] Update start-gii.md

[ci skip] Update structure-applications.md

[ci skip] Update structure-application-components.md

[ci skip] Update start-installation.md

[ci skip] Update runtime-url-handling.md

[ci skip] Update structure-application-components.md

[ci skip] Update concept-aliases.md

[ci skip] Update concept-autoloading.md

[ci skip] Update concept-components.md

[ci skip] Update concept-di-container.md

[ci skip] Update concept-properties.md

[ci skip] Update intro-upgrade-from-v1.md

[ci skip] Update rest-rate-limiting.md

[ci skip] Update rest-resources.md

[skip ci] Update rest-response-formatting.md

[skip ci] Update runtime-logging.md

update caching-page.md [skip ci]