Enhancement: Proper linting of Markdown documentation generated for client SDKs

Created by: theWhiteWulfy

Description

The markdown documentation generated for clients are not properly linted and cause problems with markdown based documentation generators i.e. docusaurus or docsify

openapi-generator version

4.0.0-beta2

Steps to reproduce

The issue could be reproduced by selectively generating Client SDK docs and using it inside a docs folder inside a Docsify/Docusaurus installation.

Related issues/PRs

None found. But a similar open issue exists in swagger-codegen.

Suggest a fix/enhancement

I've fixed the linting problems on Android, C#, Java, JavaScript, Go, Ruby-client, python and PHP