tokens: ERC1155 contract for tokens (#6376)

* tokens: ERC1155 contract for tokens

* simplify 1155

* NFT and minter contracts

* update NFT

* update

* update

* update

* update

* NFT metadata JSON

* update token metadata

* flattened contracts

eth/nft/scripts/deploy_with_ethers.ts

@@ -0,0 +1,10 @@
+import { deploy } from './ethers-lib'
+
+(async () => {
+  try {
+    const result = await deploy('MyToken', [])
+    console.log(`address: ${result.address}`)
+  } catch (e) {
+    console.log(e.message)
+  }
+})()