Define pattern for static assets useage

[avive]

Is your feature request related to a problem? Please describe.
We need a clear pattern for using static assets in a cross-platform manner. e.g. images.
For example - an extension of this method might work well for us: https://github.com/vovkasm/react-native-web-image

Describe the solution you'd like
The solution should provide a clear pattern and a code example which implements the pattern.
It is ok to assume that a cosmic app is always online - offline support is not a priority for the project.
The solution needs to work well for all supported platforms. e.g. web, ios, android and desktop/electron.

Describe alternatives you've considered
n/a

Additional context
Add any other context or screenshots about the feature request here.