- Maintain original library layout (src/, utility/) instead of flattening files
- Add exclusion logic for non-buildable directories (examples, tests, docs, CI)
- Dynamically generate INCLUDE_DIRS from actual directory structure
- Add validation to ensure buildable source files exist before proceeding
- Support both flat and src-based library layouts
- Fix path separator normalization for cross-platform compatibility
This improves compatibility with complex Arduino libraries that rely on
specific directory structures and relative includes.
4ff1502b96