Need to Update CODESTYLE.md for Documentation

[ShiroTohu]

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Description

When writing the documentation, I think the codestyle could be updated since there were some things that were a bit unclear when I was reviewing and making sure that the migrated documentation aligned with the predefined codestyle.

I think that these things needs to be added to the file.

• Syntax for callouts
• How to write markdown documentation for methods
• How to write markdown documentation for attributes
• How to write markdown documentation for parameters
• Code blocks (using shorthands or full name?)