systemd: add service for presets

data/systemd/meson.build

+systemd = dependency('systemd', required: true)
+
+install_data(
+  'ximperconf-presets.service',
+  install_dir: systemd.get_variable(pkgconfig :'systemduserunitdir'),
+)

data/systemd/ximperconf-presets.service

+[Unit]
+Description=Apply ximperconf presets
+
+[Service]
+Type=oneshot
+ExecStart=/usr/bin/ximperconf preset apply-all
+
+[Install]
+WantedBy=default.target

meson.build

@@ -20,6 +20,7 @@ if get_option('shell_completion').enabled()
   subdir('data/completion')
 endif
 
+subdir('data/systemd')
 subdir('po')
 
 custom_target(