[Documentation] Draft and publish theme highlights

[xames3]

• need to draft a standard documentation for highlighting the capabilities of the Coeus Sphinx Theme.
• this documentation will mostly consist of steps of using the theme, kitchen sink examples and some more details about the extensions which are natively supported.
• need to comply and adhere to the licensing strategies of the used extensions and need to provide them a separate section for shining off.
• this issue could be broken off into multiple small tasks but need to come up with those individual bits and pieces.