[skip ci] fix link to extension guidlines

Remove the focus on the search field

[skip ci] Update rest-response-formatting.md (grammar fix)

fixed grammar in russian

Added `yii\composer\Installer::postCreateProject()` and modified the syntax of calling installer methods in composer.json [skip ci]

Added note to config change

To get rid of confusions and errors. related to https://github.com/yiisoft/yii2/issues/4893

Faker console controller adjustments

related to #4792, close #4874

ensure it is one of the input values

fixes #4880

[skip ci] Translation of rest-response-formatting.md

fix translation errors

Fixes typos in security-passwords.md

Fixes #4424: Added `inline` and `mimeType` options to all file downloading methods provided in `yii\web\Response`

[ci skip] Russian translation for tutorial-core-validators

[ci skip] controllers guide translated