cli: add token transfer

[martin0995]

This pull request introduces improvements to configuration management and error handling in the CLI, along with a new command for token transfers. The key changes are the extraction and centralization of configuration types and loading logic, enhanced error reporting for RPC issues, and the addition of a token transfer command.

Configuration Management Improvements:

• Moved ChainConfig and Config type definitions, as well as the loadConfig function, from cli/src/index.ts to a new file cli/src/deployments.ts for better organization and modularity. Imports and exports were updated accordingly.

Error Handling Enhancements:

• Added a new handleRpcError function to cli/src/error.ts to provide improved error reporting for RPC connection issues, including contextual information about the chain and network.

New Feature: Token Transfer Command:

• Integrated a new token transfer command by importing createTokenTransferCommand from cli/src/tokenTransfer.ts and registering it with the CLI command parser.

Examples

# Transfer 5 tokens from Sepolia to Solana using the deployments written to deployment.json
ntt token-transfer \
  --network Testnet \
  --source-chain Sepolia \
  --destination-chain Solana \
  --amount 5 \
  --destination-address Ez6j... \
  --deployment-path ./deployment.json

# Move 0.1 tokens from Solana to Sepolia using a local payer keypair file
ntt token-transfer \
  --network Testnet \
  --source-chain Solana \
  --destination-chain Sepolia \
  --amount 0.1 \
  --destination-address 0xabc123... \
  --p ./deployment.json \
  --payer ~/.config/solana/devnet.json

# Transfer from an EVM chain to Solana with a custom msgValue to fund executor rent
ntt token-transfer \
  --network Testnet \
  --source-chain Sepolia \
  --destination-chain Solana \
  --amount 2 \
  --destination-address Ez6j... \
  --destination-msg-value 15000000 \
  --deployment-path ./deployment.json

Codebase Cleanup:

• Removed duplicate configuration type definitions and the local loadConfig function from cli/src/index.ts after moving them to cli/src/deployments.ts.

[evgeniko]

could you please adjust the Readme inside the cli repo: https://github.com/wormhole-foundation/native-token-transfers/blob/main/cli/README.md, and point to our docs:
https://wormhole.com/docs/products/token-transfers/native-token-transfers/get-started/
No need to add all the commands there, just a pointer to the docs should be enough imo

[evgeniko]

lgtm, amazing work