Suggest @cloudflare/worker-loader when trying to load .ts, .tsx, or .jsx modules in worker-loader.c++

[jahands]

This will help point users to https://www.npmjs.com/package/@cloudflare/worker-bundler when they try to bundle typescript.

[github-actions]

All contributors have signed the CLA ✍️ ✅
_{Posted by the CLA Assistant Lite bot.}

[jahands]

I have read the CLA Document and I hereby sign the CLA

[jahands]

Amended commit to trigger CI (failure looked like a flake)

[codspeed-hq]

Merging this PR will improve performance by 12.35%

⚡ 1 improved benchmark
✅ 69 untouched benchmarks
⏩ 129 skipped benchmarks¹

Performance Changes

	Benchmark	BASE	HEAD	Efficiency
⚡	Encode_ASCII_1024[TextEncoder][0/0/1024]	3.6 ms	3.2 ms	+12.35%

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_{Comparing jahands:jhands/dynamic-worker-message (e66a5ce) with main (0d830b1)}

Footnotes

1. 129 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

[jahands]

Feel free to merge @kentonv @jasnell ! (I don't have perms)