🧪 Add test file for TypeScript polyglot sample

[undivisible]

🎯 What: The testing gap addressed is the missing test file for the sample.ts polyglot sample. The sample contains basic structures that are straightforward to test without external dependencies.
📊 Coverage: The tests cover the answer function, the TypedCounter class (initialization and incrementing), and the quadruple function. A workaround was used utilizing Bun's transpiler and dynamic evaluation to test the functions without modifying the source to add export keywords.
✨ Result: Test coverage is improved for the TypeScript polyglot sample, ensuring its logic is verified and less prone to regressions.

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PR created automatically by Jules for task 17216821589174344295 started by @undivisible

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Note

Low Risk
Test-only addition with no production or runtime behavior changes.

Overview
Adds Bun test coverage for the polyglot sample.ts demo via a new sample.test.ts.

Tests exercise answer, TypedCounter (initial value and inc), and quadruple without changing the sample source: the file is read, transpiled with Bun.Transpiler, then symbols are pulled out through dynamic evaluation so export keywords are not required.

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