Merge pull request #5524 from alanwillms/pt-br-guide-start-looking-ahead

pt-BR guide/getting started/looking ahead [skip ci]
Add images to pt-BR guide [skip ci]
Merge pull request #5525 from alanwillms/pt-br-guide-images

Add images to pt-BR guide [skip ci]
Update structure-views.md

Possible typo.

close #5526
Fix a typo "o" -> "to" in structure-assets.md

close #5527
Update output-data-widgets.md

changed  $query->from(['author' => 'users'])  to  $query->from(['author' , 'users']) on line 354
Merge pull request #5530 from amjadniazi48/patch-1

Update output-data-widgets.md
Typo in the english version
Revert "Update output-data-widgets.md"
Merge pull request #5532 from yiisoft/revert-5530-patch-1

Revert "Update output-data-widgets.md"
Update ArrayDataProvider.php

ensure syntax highlighting
Remove stability=dev

Shouldn't stability=dev be removed?
Merge pull request #5534 from germanliu/patch-1

[skip ci] Remove stability=dev
Update tutorial-mailing.md
Merge pull request #5535 from germanliu/patch-2

[ci skip] Update tutorial-mailing.md
phpdoc fixes and additions
Used import instead of FQN
more phpdoc
Removed unused aliases
Removed unused code