Add Security.md Security Policy for Reporting Vulnerabilities Appropriately

[rakataprime]

It is important to create a policy for reporting security vulnerabilities for smart contract and blockchain projects outside of github issues. This can often be a security.md or SECURITY.md file that is referenced in the readme.md

Example:
see https://github.com/CosmosContracts/juno/blob/main/SECURITY.md as an example from the cosmos ecosystem.

Full Disclosure:
I am a part of SecurityDAO https://secdao.xyz/ and our DAO does security audits and security consulting for cosmos projects and cosmwasm smart contracts

┆Issue is synchronized with this Jira Task by Unito

[ef3n9r98]

Hey @aelesbao, is this issue still open? I know some devs who'd be interested in working on this. If you have a budget for it, I can put this issue up on OpenQ, and find someone interested.

Thanks!