chore added readmes for code snippets

examples/evm/multichain-game/README.md

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+# Multichain Game
+
+This example demonstrates a simple guessing game where users can guess a number between 1-6 and stake some funds for each guess. If the correct number is guessed then you win the pot! The `MultichainGameReceiver` exists on a single chain and can hold a variety of different tokens. It pays back the winner playing the game via the `MultiChainGame` contract on one of the satellite chains the game is deployed on.
+
+# Testnet
+On testnet this can be tested from Celo chain where you can send WETH to the Polygon Mumbai testnet to conduct the swap on the Uniswap router.
+
+## Local Test
+Local testing with Axelar Local Dev is WIP.

examples/evm/multichain-nft-mint/README.md

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+# Multichain Swap NFT Mint
+
+This example demonstrates how to mint an NFT on a destination chain via a message triggered from your source chain. It encodes a function signature of the `safeMint()` function and `calls` the function signature on the destination chain.
+
+
+## Local Test
+Local testing with Axelar Local Dev is WIP.

examples/evm/multichain-swap/README.md

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+# Multichain Swap Example
+
+This example demonstrates how to interact with the Uniswap router to do a cross chain swap. The contract can send a gmp message and a token from one blockchain to another blockchain and that message will tell the uniswap router to swap the token that was sent for another token.
+
+# Testnet
+On testnet this can be tested from Celo chain where you can send WETH to the Polygon Mumbai testnet to conduct the swap on the Uniswap router.
+
+## Local Test
+Local testing with Axelar Local Dev is WIP.