feat: NFT vault

[tHeMaskedMan981]

NFT Vault -

• all type of NFT assets can be deposited in a single vault
• vault stores depositor and all nfts per collection.
• if strategy address is present, all nfts are auto-deposited to strategy for staking.
• if strategy address is not present, nfts are stored at vault, and owner can manually deposit NFTs to strategy, or strategy can pull NFTs from vault for staking.
• user can withdraw NFTs at any time. NFTs are withdrawn from strategy and transferred to user