add: mate-dock-applet (#2261)

Closes: #2247
(cherry picked from commit 37f1632)

anda/desktops/mate/dock-applet/anda.hcl

@@ -0,0 +1,5 @@
+project pkg {
+    rpm {
+        spec = "mate-dock-applet.spec"
+    }
+}

anda/desktops/mate/dock-applet/mate-dock-applet.spec

@@ -0,0 +1,36 @@
+%define debug_package %nil
+
+Name:           mate-dock-applet
+Version:        21.10.0
+Release:        1%?dist
+Summary:        Application dock for the MATE panel
+License:        GPL-3.0-or-later
+URL:            https://github.com/ubuntu-mate/mate-dock-applet
+Source0:        %url/archive/refs/tags/%version.tar.gz
+BuildRequires:  automake make gcc
+BuildRequires:  python3 python3-xlib python3-pillow glib2-devel python3-cairo bamf-daemon bamf python3-distro gettext-devel
+Requires:       bamf libnotify mate-panel python3-cairo python3-dbus python3-gobject python3-pillow python3-xdg python3-xlib
+Packager:       madonuko <[email protected]>
+
+%description
+%summary.
+
+%prep
+%autosetup
+autoreconf -fi
+
+%build
+%configure --with-gtk3
+%make_build
+
+%install
+%make_install
+
+%files
+%doc README.md
+%license COPYING
+%_libdir/mate-applets/%name/
+%_datadir/dbus-1/services/org.mate.panel.applet.DockAppletFactory.service
+%_datadir/glib-2.0/schemas/org.mate.panel.applet.dock.gschema.xml
+%_datadir/locale/*/LC_MESSAGES/%name.mo
+%_datadir/mate-panel/applets/org.mate.panel.DockApplet.mate-panel-applet