Update polish translation
Updated Russian framework messages
Renamed translations → translation-workflow.md
Edited Russian guide sections about caching and autoloading
Added "other" rules to polish translations
`aliases.php` renamed to `bootstrap.php` (introduced to specific applications too)
Merge pull request #4992 from Skysplit/pl-messages

Update polish translation [skip ci]
Merge pull request #4993 from creocoder/aliases-to-bootstrap

Adv template `aliases.php` => `bootstrap.php` (common + specific for apps)
Improve docs for CheckboxColumn::$checkboxOptions
Merge pull request #4995 from mikehaertl/master

[ci skip] Update docs for CheckboxColumn::$checkboxOptions
reverted a previous change .
Additional fixes
Merge pull request #4998 from creocoder/aliases-to-bootstrap

Additional fixes for #4993
Typo in concept-behaviors.md

The method 'bar()' does not exist in this context. I believe it should be 'foo().'
Merge pull request #5002 from willaustin/patch-1

Typo in concept-behaviors.md