feat(HIP-540): change or remove existing keys from tokens

[RickyLB]

Signed-off-by: Ricky Saechao ricky@launchbadge.com Description:

HIP-540 provides a consistent ability to manage and remove admin and privileged keys associated with tokens, enhancing the flexibility and security of token management within the Hedera network.

Related issue(s):

• https://github.com/hashgraph/hedera-sdk-swift/issues/167

Fixes #

Notes for reviewer:

Checklist

• [x] Documented (Code comments, README, etc.)
• [x] Tested (unit, integration, etc.)