[Doc] Create a style guideline

[rheone]

Description

We're lacking a style guideline both for the C# code and the Sphinx doc generation.

Impact

It will keep the code clean and concise for all devs

Proposed solutions

• provide a document with the desired guidelines
• settle upon a .editorconfig for all file types
• create appropriate resharper code formatter
• define linter / formatter rules as appropriate
• run linter as part of build step

[rheone]

Restrucutred Text headings should use the documented Sphinx and RST syntax guide (0.9.3) hierarchy:

• # with overline, for parts
• * with overline, for chapters
• =, for sections
• -, for subsections
• ^, for subsubsections
• “, for paragraphs