/docs/guide-ja/tutorial-template-engines.md added [ci skip]

Update intro-upgrde-from-v1.md in guide-es [skip ci]

[skip ci] Added and translated documentation file in Russian

Update runtime-routing.md Guide ES [skip ci]

Fixes #6697: Added `yii\helpers\Url::current()` method that allows adding or removing parameters from current URL

Fixes #5690: adjusted paths in message config generated by `yii message/config` to reflect directory structure better

Add mimeTypes Arabic validation message

Add mimeTypes Arabic validation message

* creocoder-incorrect-checking-sqlite-version:
  improved db test, avoid error by accessing db directlry
  fixed failure on sqlite version check
  Correct SQLite version checking

always use getConnection()

ensure PDO instance has been created at this point

fixes #6741

always use unique directory for each test

only the phpManager configuration was described, the DbManager configuration was not found on this documentation

close #6771

http://en.wikipedia.org/wiki/Year_2038_problem

formatting date and time values for years >=2038 or <=1901 is now possible also with intl extension is
installed. 32bit systems will fall back to the PHP implementation because intl uses a 32bit UNIX timestamp internally.
On a 64bit system the intl formatter is used in all cases if installed.

fixes #5577

[skip ci] Fix Arabic File Type Validation Message