Support LinkingOut

This runs on hosting bills and coffee. If it's been useful, here's how to help keep it going.

Set NEXT_PUBLIC_BMC_USERNAME in .env to show a Buy Me a Coffee button here.

Set NEXT_PUBLIC_PAYPAL_URL in .env to show a PayPal button here.

Crypto

Add NEXT_PUBLIC_BTC_ADDRESS, NEXT_PUBLIC_ETH_ADDRESS, or NEXT_PUBLIC_USDC_ADDRESS in .env to show wallet addresses here.