chore: esm sample

[ScriptedAlchemy]

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[ScriptedAlchemy]

Closing this stale ESM sample branch rather than trying to merge it as-is.

Current state:

• mergeable=CONFLICTING / mergeStateStatus=DIRTY
• no current check rollup
• maintainerCanModify=false
• includes large stale dependency/lockfile churn

The useful salvage is a clean ESM remote-entry example rebuilt on current master/current deps, not this branch wholesale. Carry forward the ESM configuration ideas only:

• Rsbuild host/remote with module script output, remote type/module entry loading, and the host actually consuming remote/App
• remote output with runtime:false, filename static/remoteEntry.js, library.type=module, topLevelAwait/outputModule/module chunk loading
• direct Rspack module-output remote config and React JSX runtime sharing

TraceDecay/core check: current runtime-core still supports remoteInfo.type 'esm'/'module' through dynamic import(entry), but the imported remote must still present the expected container shape with get/init. A replacement PR should demonstrate that current API path directly and regenerate lockfiles from current deps.