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/Logging.cpp

@@ -0,0 +1,5 @@
+#include "Logging.h"
+
+Q_LOGGING_CATEGORY(lcApp, "omaphoto.app")
+Q_LOGGING_CATEGORY(lcRendering, "omaphoto.rendering")
+Q_LOGGING_CATEGORY(lcIO, "omaphoto.io")