Release v0.2.0: native GUI and managed KiCad libraries

CHANGELOG.md

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+# Changelog
+
+## 0.2.0
+
+- Import components into global or portable project libraries, creating and registering libraries when needed.
+- Reuse confidently matching footprints and compare uncertain matches in native Rust dialogs.
+- Discover possible open KiCad projects and choose a destination for watched downloads.
+- Copy 3D models into managed libraries, repair model paths, and resolve ambiguous model choices.
+- Keep pending imports and history, retry failures, and back up modified library files.
+- Bundle egui/eframe dialogs and footprint previews in the executable, with rfd file selection.
+- Document setup and a persistent user systemd service.
+
+Validation: 58 automated tests, Clippy, formatting, and release build passed. Live desktop dialogs, portal file pickers, and KiCad integration still require manual verification.
+
+## 0.1.0
+
+- Initial component importer release.