pkgroll: Zero-Config Rollup Bundler

pkgroll is a robust JavaScript package bundler built on Rollup, designed for zero-configuration builds by leveraging existing `package.json` fields like `main`, `module`, `types`, and `exports`. It streamlines the process of transforming TypeScript/ESM source code into various output formats, including ESM, CommonJS, and TypeScript declaration files (`.d.ts`). Currently stable at version 2.27.0, pkgroll maintains a frequent release cadence, with multiple bug fixes and minor feature additions observed monthly. Its key differentiators include automatic dependency externalization, built-in minification, comprehensive TypeScript support with `.d.ts` bundling, watch mode for development, and intelligent CLI output features such as hashbang insertion for executables. It simplifies package publishing by reducing the need for extensive build configurations.