Initial commit: FlatKontrol, a Kirigami Flatpak permissions manager

A KDE/Qt application to review and edit the permissions of installed
Flatpak applications, editing the same override files as Flatpak itself.
Covers shared subsystems, sockets, devices, features, filesystem access,
persistent paths, environment variables, D-Bus policies and portals.

Includes a Flatpak manifest and a CI workflow that publishes a bundle and
a hosted Flatpak repository on tagged releases.

icons/io.github.toservetheking.FlatKontrol.svg

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- SPDX-License-Identifier: GPL-3.0-or-later -->
+<svg width="128" height="128" viewBox="0 0 128 128" xmlns="http://www.w3.org/2000/svg">
+  <defs>
+    <linearGradient id="bg" x1="0" y1="0" x2="0" y2="1">
+      <stop offset="0" stop-color="#3daee9"/>
+      <stop offset="1" stop-color="#2b6cb0"/>
+    </linearGradient>
+  </defs>
+
+  <!-- rounded-square backdrop -->
+  <rect x="8" y="8" width="112" height="112" rx="28" ry="28" fill="url(#bg)"/>
+
+  <!-- three permission toggles -->
+  <g>
+    <!-- on -->
+    <rect x="32" y="34" width="64" height="16" rx="8" fill="#ffffff" fill-opacity="0.35"/>
+    <circle cx="88" cy="42" r="11" fill="#ffffff"/>
+    <!-- off -->
+    <rect x="32" y="56" width="64" height="16" rx="8" fill="#ffffff" fill-opacity="0.25"/>
+    <circle cx="40" cy="64" r="11" fill="#ffffff" fill-opacity="0.75"/>
+    <!-- on -->
+    <rect x="32" y="78" width="64" height="16" rx="8" fill="#ffffff" fill-opacity="0.35"/>
+    <circle cx="88" cy="86" r="11" fill="#ffffff"/>
+  </g>
+</svg>