OmaPhoto 1.0.0: the Linux port of Compositor

A layered image editor for Linux and Omarchy, ported from Compositor
(github.com/robbietilton/Compositor), whose Swift source is its
specification. It reads and writes Compositor's .comp projects.

Packages for Ubuntu, Fedora and Arch come from the release workflow;
scripts/install/ holds one install script per distribution family,
and flake.nix serves NixOS.

Co-Authored-By: Claude <noreply@anthropic.com>

src/Document/Distort+Session.h

@@ -0,0 +1,14 @@
+// Swift's Distort extension: four corners dragged apart.
+public:
+    void beginDistort();
+    void previewCorners(const Corners &corners);
+    std::optional<DistortPreview> distortPreview(const ImageLayer &layer) const;
+    // A layer's effects warped with the pending distortion.
+    std::optional<DistortWarp::Warped> distortedEffects(const ImageLayer &layer, const QImage &image, double inset) const;
+    // For a known target: the commit's, once the edit ends.
+    std::optional<DistortWarp::Warped> distortedEffects(const ImageLayer &layer, const QImage &image, double inset, const DistortTarget &target) const;
+
+private:
+    std::optional<DistortTarget> distortTarget(const ImageLayer &layer, const TransformEdit &edit, const Corners &shape) const;
+    void commitDistort(const TransformEdit &edit, const Corners &shape);
+    void distort(int index, const LayerTransform &transform, const Corners &corners);