style(Maintain): Apply consistent Rust formatting to Rhai config tests

Reformat test and example files to follow standard Rust style conventions:
- Group and order imports (std, external crates, local modules)
- Add braces to single-expression match arms for consistency
- Adjust function parameter spacing to match Rust conventions
- Reformat struct field declarations with consistent spacing
- Clean up comment formatting in test headers

These style changes ensure consistent code formatting across all Rhai configuration test files without altering any functionality.

Author: NikolaRHristov