Move reusable styles and images to assets

[Megha-Dev-19]

Let's create a common folder called assets which has css, images and svgs files export which we use across gateway.

[elliotBraem]

Great!

bos-workspace has support for IPFS uploading and using these aliases in code; I'll work on the documentation to make it clear and make sure it still works. We can take advantage of it here

[Megha-Dev-19]

@elliotBraem can you please share the link here, of the documentation, so whoever picks it up gets an idea of how we can implement it in best way.