docs: document log.style, log.mode and app()->logger() - #146

Changed pages include:

• index.html - view
• 404.html - view
• api-reference.html - view
• community/index.html - view
• docs/index.html - view
• learn/index.html - view
• support.html - view
• tutorial/index.html - view
• community/code-of-conduct.html - view
• community/faq.html - view

There are more changes not included in the list