64-bit Integer Representation for JavaScript

The `node-int64` library provides a class, `Int64`, to precisely represent 64-bit integers in JavaScript, addressing the inherent limitation of JavaScript's IEEE 754 double-precision floats which lose integer precision beyond +/- 2^53. It is currently at version 0.4.0, which was published 11 years ago, and the project is not actively maintained, with its author noting that native `BigInt`s will likely obsolete it. The library aims to provide a Number-like object primarily for carrying 64-bit integer values, such as those encountered in binary data formats like Apache Thrift, rather than for performing 64-bit integer arithmetic. While instances can be coerced to JavaScript numbers for basic operations, values exceeding the safe integer range will resolve to `Infinity`. Its primary utility lies in preserving the exact 64-bit binary representation, which can be extracted as an octet string or Node.js `Buffer`. This makes it suitable for interoperability with systems requiring precise 64-bit data types, distinguishing it from libraries focused on arbitrary-precision arithmetic.