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.

.gitignore

@@ -0,0 +1,10 @@
+# Build output
+/build/
+/builddir/
+# Flatpak build artifacts
+/.flatpak-builder/
+/repo/
+*.flatpak
+# Editor / misc
+*.user
+*.autosave