feat(theme): create dark theme for the website

[120EE0692]

@Monday-Morning/team-2022-23

• You have to plan and execute the entire task yourself.
• break the issue in multiple sub issues.
• create all sub issues in github and assign yourself.

[rutajdash]

@120EE0692 please make an umbrella issue (like this) for this and track all related issues in it.

Also, let's make this a level 2 priority right now.