1.Who can create NFT Staking project?

Anyone. if you are the NFT collection owner,then your project will be tag as "official"

2.What does stake,unstake,claim mean?

stake:stake your NFT to NFT staking project
unstake:get back your NFT,and get token reward
claim:get token reward,your NFTs are stored in the NFT staking project and continue to earn tokens until you unstake it.

3.How is the token reward calculated?

The longer you stake, the more rewards you get.

4.If I create a NFT Staking Project, am I the owner of the contract?

Yes, after you create a NFT Staking Project, you just create the stake contract and token contract, you are the owner of them.Full control