🧹 Code Health: Remove console.log from generate-icons.js

[savvides]

🎯 What: Removed the console.log('Icons generated successfully.'); statement from extension/icons/generate-icons.js.
💡 Why: To improve code cleanliness by removing an unnecessary console output from a script.
✅ Verification: Verified by executing the test suite (./test/smoke-test.sh and ./test/integration-test.sh) ensuring no regressions were introduced and functionality was preserved.
✨ Result: A slightly cleaner build script without unnecessary standard output messages.

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PR created automatically by Jules for task 4439538690320947743 started by @savvides

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