Update Mustafa Erbay uses profile

[merbay-erp]

What changed

Refresh Mustafa Erbay's /uses listing to accurately describe his infrastructure and systems background without overstating it.

• Clarify 20+ years of experience across networks, security, DevOps, and self-hosted systems.
• Add the current focus on burncpu.
• Replace blog-implementation tags with the core infrastructure, platform, security, and open-source areas represented on the uses page.

Validation

• npx eslint src/data.js
• npm run readme
• curl -I https://mustafaerbay.com.tr/uses

The linked /uses page remains unchanged; this PR only updates the generated directory data.

[BlakeCampbells]

Thanks for the update @merbay-erp