docs: add examples for variable naming

[leviFrosty]

Updates coding-standards.md:493-536 to include new example for variable naming based on provided standards for easier visual comprehension.

[yokuze]

Thanks for adding this! I think it'll be helpful to have a concise reference for devs to scan.

Could you:

1. Make the example TypeScript
2. Format the example according to our ESLint standards

?

Thanks

[velocitysystems]

It would be useful to also include an example of an acronym e.g. URL.

[leviFrosty]

I have updated the example to be Typescript. To align better with actual coding problems, I've centered the example around an ApiClient, not just abstract variables. I included some missing examples as well (protected & static methods). I also formatted the document to be aligned with our existing formatting standards. @yokuze

@velocitysystems I've added a naming example using "URL" acronym.

Thanks everyone!