Create private voting example for the Lit developer docs

[a1ttech]

Using the Lit-Privacy-SDK and associated blog post as a starting point, create an example for the Lit developer docs that demonstrates how you can use PKPs and Lit Actions to enable privacy-preserving interactions on-chain, such as to enable privacy-preserving voting for on-chain governance. You should be using the Lit SDK V3 for this project.

Please submit a PR to add this work to the 'Integrations' section of the docs by creating a new category for governance: https://developer.litprotocol.com/v3/integrations/

Please keep in mind that the Lit network is still in testnet and storing assets with real world value IS NOT RECOMMENDED at this time.