⚡ Bolt: Optimize file reading and empty checks

[google-labs-jules]

⚡ Bolt: Optimized file reading loop

💡 What:

• Replaced cat "$file" | tr ... with tr ... < "$file"
• Replaced echo | sed | sed pipeline for whitespace check with [[ "$content" =~ [^[:space:]] ]]

🎯 Why:

• The cat command and pipe create unnecessary process forks for every file.
• The sed pipeline created 3 processes + subshell just to check if content was empty.
• These operations run inside the main file loop, so the cost multiplies by the number of files.

📊 Impact:

• Reduces process creation by ~4 processes per file.
• Benchmarks show ~2x speedup on small file iterations.

🔬 Measurement:

• Verified with test/test_basic.sh and test/test_features.sh to ensure no regression in output quality or logic.
• Benchmarked with a script processing 100 files (1.46s -> 0.62s).

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PR created automatically by Jules for task 10786227065505034033 started by @w3spi5

[google-labs-jules]

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