🐛 Bug: Runtime errors crash the REPL

[danvk]

Expected

The REPL should print runtime errors and let you continue.

Actual

The REPL crashes.

Additional Info

$ npx gravlax
> 1 + nil
node:internal/readline/emitKeypressEvents:74
            throw err;
            ^

RuntimeError: Operands must be two numbers/currencies or two strings.
    at Interpreter.binary (file:///Users/danvk/github/gravlax/lib/interpreter.js:86:19)
    at Interpreter.evaluate (file:///Users/danvk/github/gravlax/lib/interpreter.js:172:21)
    at Interface.<anonymous> (file:///Users/danvk/github/gravlax/lib/main.js:32:41)
    at Interface.emit (node:events:518:28)
    at [_onLine] [as _onLine] (node:internal/readline/interface:416:12)
    at [_line] [as _line] (node:internal/readline/interface:887:18)
    at [_ttyWrite] [as _ttyWrite] (node:internal/readline/interface:1265:22)
    at ReadStream.onkeypress (node:internal/readline/interface:264:20)
    at ReadStream.emit (node:events:518:28)
    at emitKeys (node:internal/readline/utils:371:14) {
  token: { lexeme: '+', line: 1, literal: null, type: '+' }
}

Node.js v20.11.0