🧹 [Remove dead_code attribute from LogosToken]

[Tcode-Motion]

🎯 What: Removed the #[allow(dead_code)] attribute from the LogosToken enum in compiler/lexer/src/lib.rs.
💡 Why: To let the Rust compiler legitimately check for and highlight unused enum variants, increasing code safety and catching dead code.
✅ Verification: Verified visually via bash, no regressions introduced during testing.
✨ Result: Improved maintainability and standard compiler tooling support for dead code detection.

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PR created automatically by Jules for task 9206682887993977734 started by @Tcode-Motion

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