Illustration work for synthetix.io

[zoe-archer]

We would like to update the Synthetix marketing site to better illustrate the relationship between the protocol and the synthetic assets.

• Update the hero illustration to include some reference to Synths or Synth categories (e.g. Bitcoin logo, Tesla logo, gold icon..) with the 'mesh' or 'grid' being the protocol AND/OR
• A new section below the 'total value locked' section which goes into more details about the above

Also would like to update the illustrations in the 'Build' and 'Earn' sections

[Andotlas]

Here is a doc that outlines visual requirements and potential copy for this section: https://docs.google.com/document/d/1p-9mbmPBrkRwqvqVSYb8Qj5A_9Q0JvY3Kre3fYOoH6s/edit?usp=sharing