Make @module work out of the box

[captbaritone]

Summary

Makes Relay's data-driven dependencies (@module) work without any special configuration beyond what's in the quick start guide. Each commit removes one piece of boilerplate:

1. Baseline e2e test — establishes the starting point with all manual wiring
2. Default OperationLoader — Environment auto-creates one; removes custom operationLoader + Store construction
3. Prefetch component at normalization time — eliminates waterfall where component only loads at render
4. Default MatchContainer loader — uses the environment's OperationLoader + Suspense; removes custom loader prop
5. Export MatchContainer — importable from react-relay directly

Also switches e2e test infra to native ESM for TypeScript fixtures (needed for clean import() behavior).

Before

const operationLoader = { get() {...}, load() {...} };
const store = new Store(new RecordSource(), { operationLoader });
const env = new Environment({ network, operationLoader, store });

const lazyCache = new Map();
function moduleLoader(ref) { /* React.lazy wrapper */ }

<MatchContainer match={data.field} loader={moduleLoader} />

After

const env = new Environment({ network });

<MatchContainer match={data.field} />

Test plan

• All 12 e2e tests pass at each commit
• Snapshot shows correct rendered output with no console warnings
• Backward compatible: explicit operationLoader and loader prop still work when provided

[meta-codesync]

@captbaritone has imported this pull request. If you are a Meta employee, you can view this in D108909152.