monosize Rspack Bundler Plugin

monosize-bundler-rspack is a specialized plugin for the `monosize` tool, designed to integrate Rspack as the underlying bundler for comprehensive JavaScript bundle size analysis. It allows developers to harness the high performance of Rspack for evaluating bundle sizes within large-scale monorepos or projects optimized for `monosize`. Currently at version 0.2.1, it is an actively developed component within the broader Microsoft `monosize` ecosystem. While exact release cadences are not strictly defined for this plugin, its early version number indicates ongoing development and potential for rapid evolution. A key differentiator is its default 'batch build mode,' which significantly enhances build speed (8-14x faster in typical scenarios) compared to sequential bundling, making it exceptionally well-suited for efficient monorepo size optimization. The plugin also provides an API to customize the underlying rsbuild configuration, offering flexibility for intricate build requirements.