ERC-3475 Abstract Storage Bonds

⚙️ Functions this standard introduces (13)

`0xb15edbe5`	`activeSupply(uint256,uint256)`	view
`0x443b63b9`	`allowance(address,address,uint256,uint256)`
`0x2d760d57`	`balanceOf(address,uint256,uint256)`	view
`0xbc3c19f7`	`burnedSupply(uint256,uint256)`	view
`0x3cf3a604`	`classMetadata(uint256)`	view
`0xc7da92e1`	`classValues(uint256,uint256)`	view
`0x572e5ef2`	`getProgress(uint256,uint256)`	view
`0x1fa03a2b`	`isApprovedFor(address,address)`	view
`0x029ba4eb`	`nonceMetadata(uint256,uint256)`	view
`0x693f5548`	`nonceValues(uint256,uint256,uint256)`	view
`0xccea7b86`	`redeemedSupply(uint256,uint256)`	view
`0x4bb95aa2`	`setApprovalFor(address,bool)`
`0xc2458d6b`	`totalSupply(uint256,uint256)`	view