Add token metadata standards to create token docs

[Cooper-Kunz]

Problem

Currently, when reading the documentation, it is unclear that there are existing standards (namely HIP-405, & HIP-412) for token metadata. It actually even references ethereum standards, but not the Hedera community's own (via smart contracts). This leads projects to either recreate the wheel in attempting to define their own token metadata, or create assets who's metadata are not compatible with other applications/wallets/etc., within the ecosystem.

Solution

I think it would be nice to update this page (&/or potentially others) with reference to these token metadata standards

https://docs.hedera.com/guides/docs/sdks/tokens/define-a-token

Alternatives

Alternatively (&/or additionally) I think it could be nice to build in better support for these standards within the official SDKs.