drachtio Signaling Resource Framework

The `drachtio-srf` package, currently at version 5.0.22, is a Node.js framework for building Signaling Resource Function (SRF) applications, primarily for SIP (Session Initiation Protocol) servers. It provides a high-level API for handling SIP signaling, allowing developers to create complex SIP applications such as proxies, Back-to-Back User Agents (B2BUAs), and custom routing logic. The framework abstracts much of the complexity of the SIP protocol, leveraging a network connection to a separate `drachtio-server` process which handles the underlying SIP transaction processing. It requires Node.js version 18.x or higher and ships with TypeScript types, facilitating modern JavaScript and TypeScript development for real-time communication services.