Use esbuild to bundle JS files for the webview

Jasonelle injects JavaScript into the webview of the final Xcode and Android projects. The JS comes from multiple files that must be combined into a single file, but a naive concatenation does not handle modules, minification, or optimization. Which tool should bundle the JavaScript files into one file to be included in the native project and injected in the webview?

Chosen option: "Use esbuild", because it is fast, has zero configuration for simple bundling, and produces a single minified JS file that can be included in the Xcode and Android projects and injected into the webview. Positive consequences: fast bundling, minimal setup, and a well-established ecosystem. Negative consequences: an extra build dependency and a bundling step in the build pipeline.

esbuild is the best option for now, because it covers the current bundling needs with almost no configuration. If "Use Rolldown" was chosen, the project would adopt a newer, less mature tool before it is needed. If "Write a custom concatenation script" was chosen, module resolution and minification would be reimplemented by hand. Revisit whether Rolldown can replace esbuild when the Jasonelle project is more mature.