Docs guide ja intro refined [ci skip]

Fixes #6969: `yii\helpers\ArrayHelper::htmlEncode()` and `htmlDecode()` should not remove non-string data

fixes #6896

close #6913

Update start-installation.md

Docs guide ja updates (db-dao.md and others) [ci skip]

- docs/guide-pt-BR/intro-upgrade-from-v1.md - update [ci skip]
- docs/guide-pt-BR/intro-upgrade-from-v1.md - update [ci skip]
- docs/guide-pt-BR/README.md - update [ci skip]
- docs/guide-pt-BR/start-installation.md - update [ci skip]
- docs/guide-pt-BR/structure-models.md - update [ci skip]

close #6964

[skip ci] Update caching-data.md

docs/internals/translation-teams.md - update [ci skip]

fixes #6936

Update db-dao.md

There is no queryRow! There must be queryOne in Yii2
am i right?!

Update guides pt-BR [ci skip]

[skip ci] Update db-query-builder.md

Переведен structure-modules.md

Переведен concept-events.md

Update yii.php [skip ci]

Docs guide ja update [ci skip]

Conflicts:
	docs/internals-ja/design-decisions.md