p-token: Add unwrap_lamports instruction
#87
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Problem
In order to transfer out lamports from native SOL accounts, currently it is necessary to create and close ATAs or token accounts all the time.
Solution
This PR adds a new
unwrap_lamportsinstruction that allows transferring out lamports directly to any destination account. This eliminates the need for creating temporary native token accounts for the recipient.The new instruction uses the discriminator
3945, which is currently unused in Token-2022.