nft▌

ERC-721 and ERC-1155 NFT standards with metadata, royalties, and advanced features. \n \n Covers both ERC-721 (unique tokens) and ERC-1155 (multi-token) standards with complete contract examples including minting, burning, and supply management \n Supports off-chain metadata via IPFS and on-chain metadata with SVG generation, plus EIP-2981 royalty implementation for marketplace compatibility \n Includes soulbound token patterns (non-transferable), dynamic NFTs with evolving state, and gas-optimi