feat: add 3 rolldown variants and gzip variants

[Copilot]

• Create shared rolldown config utility in scripts directory that changes behavior based on env vars
• Update lodash-es-basic/rolldown.config.mjs to use shared config
• Update react-fluent-hydration/rolldown.config.mjs to use shared config
• Add build:rolldown:oxc (default + output.minify:true with oxc minifier)
• Add build:rolldown:swc (default + swc plugin minifier)
• Add build:rolldown:strictExecutionOrder (default + strictExecutionOrder:true + output.minify:true)
• Add build:rolldown:onDemandWrapping (default + strictExecutionOrder:true + onDemandWrapping:true + output.minify:true)
• Update package.json scripts for each app to include all 4 rolldown variants
• Update scripts/index.mjs to measure output from all 4 rolldown variant dist directories
• Add gzip size metrics for all bundlers
• Rename rolldown-oxc-dist to rolldown-dist (default variant)
• Add swc version to version map
• Test the build to ensure all variants work correctly
• Address PR feedback

Original prompt

Improve scripts/index.mjs to run the rolldown build with the following options as well.

1. default config + output.minify: true (oxc minifier)
2. default config + swc plugin (swc minifier)
3. default config + experimental.strictExecutionOrder: true + output.minify: true (oxc minifier)
4. default config + experimental.strictExecutionOrder: true + experimental: ondemandWrapping: true + output.minify: true (oxc minifier)

So there will be 4 cases for rolldown. The rolldown config should live in each app directory. add a shared config that changes the behavior based on env vars and use that in rolldown config of each app directory. add each build command to package.json as build:rolldown:variantName and make that called by the top level pnpm build script.

---

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.