feat: Initial flatpak support

src/flatpak/net.boxyfoxy.OptimaLab35.desktop

@@ -0,0 +1,11 @@
+[Desktop Entry]
+Version=1.0
+Type=Application
+
+Name=OptimaLab35
+Comment=A simple tool for editing images and managing metadata, designed for streamlined organization and EXIF adjustments.
+Categories=Graphics;Photography;
+
+Icon=net.boxyfoxy.OptimaLab35
+Exec=OptimaLab35
+Terminal=false

src/flatpak/net.boxyfoxy.OptimaLab35.metainfo.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<component type="desktop-application">
+  <id>net.boxyfoxy.OptimaLab35</id>
+
+  <name>OptimaLab35</name>
+  <summary>A simple tool for editing images and managing metadata, designed for streamlined organization and EXIF adjustments.</summary>
+
+  <metadata_license>CC0-1.0</metadata_license>
+  <project_license>AGPL-3.0-only</project_license>
+  <version>1.0.0</version>
+  <release>
+    <version>1.0.0</version>
+    <date>2024-01-30</date>
+  </release>
+  <description>
+    <p>
+      OptimaLab35 is a image editing and metadata management tool, designed with analog photography in mind. It provides an intuitive way to modify and add EXIF data, making scanned film images easier to organize. With features tailored for efficient batch processing, it helps photographers maintain a structured archive while preserving key details about their images.
+    </p>
+  </description>
+
+  <launchable type="desktop-id">net.boxyfoxy.OptimaLab35.desktop</launchable>
+  <screenshots>
+    <screenshot type="default">
+      <image>https://gitlab.com/CodeByMrFinchum/OptimaLab35/-/raw/main/media/main_tab.png</image>
+    </screenshot>
+    <screenshot>
+      <image>https://gitlab.com/CodeByMrFinchum/OptimaLab35/-/raw/main/media/exif_tab.png</image>
+    </screenshot>
+    <screenshot>
+      <image>https://gitlab.com/CodeByMrFinchum/OptimaLab35/-/raw/main/media/preview_window.png</image>
+    </screenshot>
+  </screenshots>
+</component>