ERC-7887 Cancelation for ERC-7540 Tokenized Vaults

DraftERCcreated 2025-02-18requires ERC-165, ERC-7540

Extension of ERC-7540 with cancelation support

Authors: Jeroen Offerijns (@hieronx), Vikram Arun (@vikramarun)

Functions this standard introduces (8)

`0xb9cf0634`	`cancelDepositRequest(uint256,address)`
`0x2b9d9c1f`	`cancelRedeemRequest(uint256,address)`
`0xaabb5922`	`claimableCancelDepositRequest(uint256,address)`	view
`0xb04a5e05`	`claimableCancelRedeemRequest(uint256,address)`	view
`0x69d77a44`	`claimCancelDepositRequest(uint256,address,address)`
`0x00a06d19`	`claimCancelRedeemRequest(uint256,address,address)`
`0xf15b65b1`	`pendingCancelDepositRequest(uint256,address)`	view
`0x7c1b50c4`	`pendingCancelRedeemRequest(uint256,address)`	view

Topic0 is the keccak256 hash of the signature, which is what a log filter matches on.

`0x4ae0134aad5d0e98e82f45680facd628ee6b5aa85ad9a85248a7ef47319f8c50`	`CancelDepositRequest(address,uint256,address)`
`0x295a9a8b44c0ac92394b0da92ef469784ff064156f08dab8316760c064c6cd2f`	`CancelDepositClaim(address,address,uint256,address,uint256)`
`0xa16c0f2cab616ed5d17cd544655b00d7062a1df7c457960cc8b9bf60770f9236`	`CancelRedeemRequest(address,uint256,address)`
`0x9c133d4657dc9cd12f4c08cef86ef778dbbe03f3ad3b661ff14d36bc3febb1fb`	`CancelRedeemClaim(address,address,uint256,address,uint256)`

Proposals this one names in its requires field.