🧹 Remove unused createMoonshineServer import in core index

[undivisible]

🎯 What: Removed the unused createMoonshineServer import from the comment block in packages/core/src/index.ts.
💡 Why: To improve code health by removing unused imports, reducing clutter, and avoiding confusion.
✅ Verification: Verified by checking the file format, running the tests with bun test packages/core, and running the linter with bun x oxlint packages/core/src/index.ts.
✨ Result: A cleaner file with no unused imports in the documentation comment.

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PR created automatically by Jules for task 2419466080610423059 started by @undivisible

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Note

Low Risk
Comment-only change with no code or API impact.

Overview
Removes the createMoonshineServer example from the file-header import guide in packages/core/src/index.ts, so the comment only lists entry points that match what this package actually documents (signals, React, runes, router, shaders).

No runtime exports or behavior change—documentation comment cleanup only.

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