Add NFT query api: getNftTemplate

[elonkusk]

Suggestion:

• input:

  message NftTemplateQuery{
    bytes owner_address = 1;
    int64 page_size = 2;
    int64 page_index = 3;
  

  }

• output: NFT template info use structure Create NFT google protobuf message format Create NFT google protobuf message format #37

  message NftTemplateQueryResult{
      bytes owner_address = 1;
      int64 page_size = 2;
      int64 page_index = 3;
      int64 total = 4;
      repeated NftTemplate templates = 5;
    }