Add working examples demonstrating how to fund an Earn Account with gas sponsorship, where users sign off-chain and a sponsor pays the gas fees.

**Python Example:**
- Uses compass_api_sdk with web3.py for signing
- Demonstrates EIP-712 off-chain signing with eth_account
- Successfully tested with 0.1 USDC transfer on Base

**TypeScript Example:**
- Uses @compass-labs/api-sdk with viem for wallet management
- Uses @metamask/eth-sig-util for EIP-712 signing (handles TypeScript SDK camelCase type keys)
- Normalizes EIP712Domain casing to match standard
- Successfully tested with 0.1 USDC transfer on Base

**Key Implementation Details:**
- Step 1 (approve_transfer): One-time Permit2 approval per token
- Step 2 (earn_transfer): Gas-sponsored deposit to Earn Account
- Owner signs off-chain (no gas cost)
- Sender broadcasts transaction and pays gas
- Requires spender parameter when using gas sponsorship for deposits

Both examples include:
- Environment configuration with .env.example
- Clear step-by-step comments with SNIPPET markers
- Error handling and transaction confirmation
- BaseScan links for transaction verification

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>