Add new TokenReturn transaction

[anighanta]

Problem

follow : hiero-ledger/hiero-consensus-node#2331

Solution

Add a new transaction TokenReturn whose body includes a (AccountID account, TokenID tokenType) pair.

When handled, it will:

1. Return all units or NFTs of tokenType owned by account to tokenType's treasury.
2. Dissociate account from tokenType.
3. Charge no custom fees.

As long as account's key signs the transaction, the TokenReturn will succeed, even if account is frozen for the tokenType, or has KYC revoked for the tokenType; and even if tokenType is paused.

Alternatives

No response

[anighanta]

token_return.proto

/**
 * An account returns the token back to its treasury and dissociates from it. 
 * This operation is free from customFee and does not stop if account is frozen for the token or 
 * kyc on this token is revoked for this account or even if the token is paused. 
 * If the provided account is not found, the transaction will resolve to INVALID_ACCOUNT_ID.
 * If the provided account has been deleted, the transaction will resolve to ACCOUNT_DELETED.
 * If the provided token is not found, the transaction will resolve to INVALID_TOKEN_ID.
 * If the provided token has been deleted, the transaction will resolve to TOKEN_WAS_DELETED.
 * If the provided token is not associated with the provided account, the transaction will resolve to TOKEN_NOT_ASSOCIATED_TO_ACCOUNT.
 */
message TokenReturnTransactionBody {
  /**
   * The token to be returned.
   */
  TokenID token = 1;

  /**
   * The account which returns the token to its treasury
   */
  AccounID account = 2;
}

[jsync-swirlds]

Stale.
See rejectToken in HIP-904 for the as-built solution.