docs(ecosystem): Add @fastify/one-line-logger

[nooreldeensalah]

Added @fastify/one-line-logger to the ecosystem core plugins.

I thought this interesting module is worth adding to the ecosystem plugins page, so that the community is more aware of it.

Checklist

• run npm run test and npm run benchmark
• tests and/or benchmarks are included
• documentation is changed or added
• commit message and code follows the Developer's Certification of Origin
  and the Code of conduct

[github-actions]

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