Initial commit: Set up MEV bot project structure

@prompts/arbitrum-monitoring.md

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+You are an expert in Ethereum and Arbitrum blockchain development. I'm building an MEV bot in Go that needs to monitor the Arbitrum sequencer for potential swap transactions.
+
+I need help with:
+
+1. Setting up a connection to an Arbitrum node (both RPC and WebSocket)
+2. Efficiently monitoring new blocks as they are added to the chain
+3. Monitoring the mempool for pending transactions
+4. Identifying transactions that interact with Uniswap-like contracts
+5. Decoding transaction data to extract swap parameters
+6. Handling network errors and reconnections gracefully
+
+Please provide production-ready Go code that:
+- Uses the go-ethereum library
+- Implements efficient polling or event-driven monitoring
+- Handles errors gracefully
+- Follows Go best practices
+- Is optimized for performance
+- Includes comprehensive comments
+
+The code should:
+- Connect to the Arbitrum mainnet RPC endpoint (https://arb1.arbitrum.io/rpc)
+- Monitor for transactions to common DEX contract addresses
+- Extract function signatures and parameters from transaction data
+- Decode swap function calls to get token addresses and amounts