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/IO/ImageFileDrop.h

@@ -0,0 +1,21 @@
+#pragma once
+#include <QMimeData>
+#include <QPointF>
+#include <QUuid>
+#include <functional>
+#include <memory>
+#include <vector>
+#include <optional>
+
+class EditorSession;
+class ProjectWorkspace;
+
+// Swift's ImageFileDrop: dropped files and pictures, in order, imported.
+namespace ImageFileDrop {
+void importProviders(const QMimeData &data, EditorSession &session, std::optional<QPointF> point, ProjectWorkspace *workspace = nullptr,
+                     std::optional<QUuid> destination = std::nullopt, std::function<void()> done = {});
+// Swift's drop types: a file on disk or a picture.
+bool holdsImages(const QMimeData &data);
+// A drag as Swift's providers: a URL each, else whole.
+std::vector<std::shared_ptr<QMimeData>> providers(const QMimeData &data);
+}