Update dark theme

[L03TJ3]

The dark theme is being updated to have a new color scheme.
Align status and updates with Sana and the updated figma screens

All areas should adequately reflect this, so update colors in tailwind/styled-components/native-base
and make sure the components switch over correctly

NativeBase

• - add colors to native-base extended theme
• - either apply colors through variants/default props / base style, or use useColorModeValue for a one-time appliance

Tailwind / styled-components

• - most of dark theme colors are defined in the base stylesheet so we only have to update the color-codes in theme stylesheet
• - make sure the classes are applied correctly to all components, most dark theme is done through styled-components CSS

WildCard todo:
Rules:

1. only when it doesn't take a lot of time (< 10 min)
2. only when it is UI and no back-end logic has to be changed

• - wherever possible see if a component can be updated to a native-base one