feat: introduce local-first SVG workbench

CHANGELOG.md

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+# Changelog
+
+All notable changes follow Keep a Changelog. Versions follow Semantic
+Versioning.
+
+## [0.1.0] - 2026-08-02
+
+### Added
+
+- Initial static, local-first SVG Tools workbench using Toolbox AppShell 0.2.3.
+- Source/tree/canvas/inspector synchronization with exact source patches,
+  last-valid invalid-source handling and application undo/redo.
+- Opaque-origin sanitized preview and project-authored hostile SVG tests.
+- Standard path parsing and first-class anchor/control/arc handles.
+- Transform analysis, preview and supported primitive/path baking.
+- Reference, geometry, security and accessibility diagnostics.
+- Worker-based SVGO profiles with cancellation and non-destructive diff.
+- SVG, SVGZ, derived SVG, raster and deterministic project exports.
+- Deterministic standalone release packaging and Toolbox Portal assembly smoke
+  test.
+
+[0.1.0]: https://git.add-ideas.de/lotobo/svg-tools/releases/tag/v0.1.0