[Docs] Revamp Docs UI Theme and layout

[mitsos1os]

Suggestion

A documentation framework or custom styles should be applied to make the documentation easier to read as very well done on different frameworks

Use Cases

As discussed in #5550, the chaotically big amount of information found in the documentation page, in combination with its really plain appearance, contribute to making it harder to read through.

Unfortunately I do not have the "stylistic" knowledge or backround to support this, I am just expressing my personal opinion on the matter. Let this issue be a place for anyone stating his opinion regarding the matter, suggesting frameworks, wireframes, etc...!

Related to Documentation Enhancements in #5113

Examples

NestJS 's documentation is a good example of UI Doc theme.

[dhmlau]

@mitsos1os, thanks for the suggestion. @achrinza had a similar proposal on the style/format changes in #4632. I'd like to close this issue as duplicate and continue the discussion over there. Thanks.