Update structure-applications.md

A small modification

close #6099

little fix

close #6098

improve

Update tutorial-advanced-app.md

Grammar fix

Fixed typos in formatter guide

Minor words order fix.

Fixes #4643: Extra options specified in `yii\widgets\Breadcrumbs::links` will be treated as HTML attributes for the generated hyperlinks

Fix backend url

close #6070

- docs/guide-ja/runtime-overview.md - added [ci skip]
- docs/guide-ja/runtime-bootstrapping.md - added [ci skip]
- docs/guide-ja/runtime-bootstrapping.md - added links to OPCache and APC [ci skip]

close #6067

close #6066

return value would not be a valid array when json encoded after unlink().

fixes #6065

close #6061

- docs/guide-ja/structure-extensions.md - prepared for translation [ci skip]
- docs/guide-ja/structure-assets.md - small changes [ci skip]
- docs/guide-ja/structure-extensions.md - WIP [ci skip]
- docs/guide-ja/structure-extensions.md - completed [ci skip]
- docs/guide-ja/structure-widgets.md - broken link fixed [ci skip]

close #6062

Fixes #6049: `yii\db\Connection::getSchema()` for Oracle should return false when the table does not exist. Oracle does not support `ON UPDATE` clause.

Fix batchInsert bug in oci. default batchInsert sql is ``` insert into tableName(col1, col2, col3...) value(`col11`, `col12`,`col13`.... ),(`col21`, `col22`,`col23`.... ); ``` which is illegal in oracle db. Change it to ``` insert into tableName(col1, col2, col3...) select 'col11', 'col12', 'col13' from dual union select 'col21', 'col22', 'col23' from dual union select 'col31', 'col32', 'col33' from dual; ```

oracle db doesn't support `ON UPDATE` in FOREIGN KEY. remove `ON UPDATE` section in method `addForeignKey`.