Explore no KYC investments

[Varunram]

AnchorUSD does not need KYC if XLM is exchanged through the DEX to get USD. Using this USD, they can technically invest in the platform and there shouldn't really be anything that prevents them from being able to invest in projects.

On a code level, this should be easy, if the user already has USD, don't check for KYC and if the user doesn't, exchange for USD through the DEX. Depending on jurisdiction, this might not be allowed, so that's something to keep in mind as well.