Better error message for "Attempt to transfer an object that's not a coin"

[huitseeker]

Passing an NFT object ID through the wallet's transfer function results in the message:

RPC call failed: ErrorObject { code: ServerError(-32000), message: "Attempt to transfer an object that's not a coin.", data: None }

See

sui/sui_types/src/error.rs

Lines 55 to 56 in c3ee146

	#[error("Attempt to transfer an object that's not a coin.")]
	TransferNonCoinError,

While the behavior is expected, this message could be more helpful, in pointing out that non-coin object transfers must go through a distinct Move call (and possibly helping me, the user, figure out how to craft that transaction).

[patrickkuo]

I have added transfer must go through move call in the error message in this PR

For more helps, maybe we should consider implementing error code and have a dedicated doc(or StackOverflow) for extra informations, can't put too much info in the error message...

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[github-actions]

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