[General] Create code of conduct and contributing guidelines

[furdzik]

• Create basic guadlines for code of conduct and contributing guidelines for this repo
• Also basic guadlines for code of conduct and contributing guidelines for this style guilde, as what need to be think of

For example:

• https://github.com/facebook/prop-types/blob/4de0644a10a554d0a556daa39f029369bc007ea5/CONTRIBUTING.md
• https://github.com/AxaGuilDEv/react-oidc/blob/master/CODE_OF_CONDUCT.md
• https://github.com/facebook/react/blob/main/CODE_OF_CONDUCT.md
• https://github.com/facebook/react/blob/main/CONTRIBUTING.md