docs: add formatting section to AsyncAPI Style Guide

[Recxsmacx]

Fixes #1694

Add a new .md file for the Formatting section of the AsyncAPI Style Guide.

• Create a new file formatting.md in the asyncapi.com/docs/community/styleguide/ directory.
• Add a title "AsyncAPI Style Guide: Formatting" at the top of the file.
• Add a section for "Notes and Warning Blocks" with guidelines for formatting notes and warning blocks.
• Add a section for "Code Blocks" with guidelines for formatting code blocks.
• Add a section for "White Space" with guidelines for using white space in documentation.

[thulieblack]

@Recxsmacx please pick 1 docs issue to work on before opening another and follow the conventional commits

[Recxsmacx]

@thulieblack actually I am solving them from the past two days a lot of negative checks were there they are just reopened

[Recxsmacx]

@thulieblack I have some questions and i messaged you on slack please have a look on it

[thulieblack]

@Recxsmacx this is not the correct way to start contributing. I understand you are new and would like to solve as many issues as you can but this isn't how we do it.

I would suggest to first close all the open PRs because it looks like you're spamming and first go through the onboarding documents.

Only after that can you start picking the good first issues.

[Recxsmacx]

@thulieblack it required a lot of time for me to figure out and correct them from the next time i will take care about everything during raising pr