docs/guide-ja/runtime - added 2 sections [ci skip]

- 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
Update tutorial-advanced-app.md

Fix backend url

close #6070
Fixes #4739: Better display of exceptions when the response format is set as "raw" format
Fixes #4492: Support PostgreSQL-specific syntax for `QueryBuilder::alterColumn()`