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/MaskTracing.h

@@ -0,0 +1,10 @@
+#pragma once
+#include <QImage>
+#include <QPainterPath>
+#include <optional>
+
+// Raster coverage traced into an outline along exact pixel edges.
+namespace MaskTracing {
+std::optional<QPainterPath> darkPixels(const QImage &image);
+std::optional<QPainterPath> opaquePixels(const QImage &image);
+}