support games-std

[tak1827]

Implement wasmd module custom msg encoder and custom query handler for supporting game-std https://github.com/cosmos-gaminghub/game-std

Checklist

• impl custom endoder
  • [x] issue denom
  • [x] mint token
  • [x] transfer token
  • [x] edit token
  • [x] burn token
• impl custom query handler
  • [x] denom
  • [x] all denoms
  • [x] nft
• [x] confirm a deployed contract work fine.

Affected core subsystem(s)

• wasmd module

Description of change

• added wasm package in nft module
• appended custom encode msg option and custom query handler option to wasmd keepr.