[codex] Fix Rollup docs import examples

[Formatted]

What changed

This updates the Rollup production docs so the example imports match the current package export shapes.

Why

The current snippets fail in a modern ESM setup:

• @web/rollup-plugin-html no longer provides a default export in the form used by the docs.
• @rollup/plugin-terser should be imported as a default export.
• rollup-plugin-minify-html-literals needs CommonJS interop in these examples.

Scope

• Fix the modern-only Rollup example in v2 and v3 docs.
• Fix the v2 modern+legacy Rollup example for the same import issues.
• Leave rollup-plugin-summary unchanged because its documented import already works.

Validation

• Reproduced the current import failures in a clean temp project with current package versions.
• Verified the replacement imports load under Node 22 ESM.

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