Add "debian/control.debian-testing" to work around removed dependencies

until Squeekboard has been ported to GTK4 or GTK4-layer-shell.

Without this change, "apt build-dep ." cannot be used to install
the other build-dependencies on Debian Testing.

Part-of: <https://gitlab.gnome.org/World/Phosh/squeekboard/-/merge_requests/633>

debian/control.debian-testing

@@ -0,0 +1,71 @@
+Source: squeekboard
+Section: x11
+Priority: optional
+Maintainer: Dorota Czaplejewicz <dorota.czaplejewicz@puri.sm>
+Build-Depends:
+ cargo,
+ debhelper-compat (= 13),
+ meson (>=0.51.0),
+ ninja-build,
+ pkg-config,
+ libbsd-dev,
+ libfeedback-dev,
+ libglib2.0-dev,
+ libgnome-desktop-3-dev,
+ libgtk-3-dev,
+ librust-aho-corasick-dev,
+ librust-bitflags-1-dev (>= 1.0),
+ librust-clap-4+std-dev (>= 4.0),
+# TODO: Port to GTK4/GTK4-layer-shell
+# https://gitlab.gnome.org/World/Phosh/squeekboard/-/issues/64
+# These dependencies have been removed from Debian Testing.
+# Building with dependencies from "crates.io" still works without these.
+# librust-gio+v2-58-dev (>= 0.18),
+# librust-glib+v2-58-dev (>= 0.18),
+# librust-glib-sys-dev (>= 0.18),
+# librust-gtk+v3-24-dev (>= 0.18),
+# librust-gtk-sys-dev (>= 0.18),
+ librust-maplit-1-dev (>= 1.0),
+ librust-serde-derive-1-dev (>= 1.0),
+# Currently in Debian Experimental
+# librust-serde-yaml-0.9-dev (>= 0.9),
+ librust-thread-local-dev,
+ librust-xkbcommon-dev (>= 0.5),
+ librust-zbus-1-dev (>= 1.9),
+ librust-zvariant-2-dev (>= 2.10),
+ librust-zvariant-derive-2-dev (>= 2.10),
+ libwayland-dev (>= 1.16),
+ lsb-release,
+ python3,
+ python3-ruamel.yaml,
+ rustc,
+ wayland-protocols (>= 1.14),
+Standards-Version: 4.1.3
+Homepage: https://gitlab.gnome.org/World/Phosh/squeekboard
+
+Package: squeekboard
+Architecture: linux-any
+Depends:
+# for Greek polytonic readability
+ fonts-gfs-didot-classic,
+# for the Adwaita-dark theme
+ gnome-themes-extra-data,
+ ${shlibs:Depends},
+ ${misc:Depends},
+Breaks:
+ librem5-base (<< 24),
+Description: On-screen keyboard for Wayland
+ Virtual keyboard supporting Wayland, built primarily for the Librem 5 phone.
+
+Package: squeekboard-devel
+Architecture: linux-any
+Depends:
+ python3,
+ python3-gi,
+ ${shlibs:Depends},
+ ${misc:Depends},
+Description: Resources for making Squeekboard layouts
+ Tools for creating and testing Squeekboard layouts:
+ .
+  * squeekboard-entry
+  * squeekboard-test-layout