⚡ Bolt: [performance improvement]

[cloudesize67-cmd]

💡 What: Optimized string manipulations in xdk-build/src/python.rs and xdk-lib/src/casing.rs to avoid intermediate collection into Vec.
🎯 Why: Creating temporary Vec allocations (such as with .collect::<Vec<&str>>().into_iter(), .split(" ").collect::<Vec<&str>>(), and .collect::<Vec<_>>().join("")) adds unnecessary memory overhead and allocation time. Using direct iterator methods and string allocations is more efficient.
📊 Impact: Reduces memory allocations during script output parsing and PascalCase string casing. Over thousands of loop iterations or formatting tasks, this will save considerable GC overhead.
🔬 Measurement: Verify by running make test-generator and make check. The functionality remains identical.

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PR created automatically by Jules for task 7673166558922985458 started by @cloudesize67-cmd

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