Add meson build system

src/meson.build

@@ -0,0 +1,75 @@
+resource_conf = configuration_data()
+resource_conf.set_quoted('RESOURCEFILE', resources.full_path())
+resource_rs = configure_file(
+  input: 'resources.rs.in',
+  output: 'resources.rs',
+  configuration: resource_conf
+)
+
+run_command(
+  'cp',
+  resource_rs,
+  meson.current_source_dir(),
+  check: true
+)
+
+sources = files(
+  'database/database.rs',
+  'database/mod.rs',
+  'database/models.rs',
+  'database/schema.rs',
+  'database/tables.rs',
+  'dialogs/ensemble_editor.rs',
+  'dialogs/ensemble_selector.rs',
+  'dialogs/instrument_editor.rs',
+  'dialogs/instrument_selector.rs',
+  'dialogs/mod.rs',
+  'dialogs/part_editor.rs',
+  'dialogs/performance_editor.rs',
+  'dialogs/person_editor.rs',
+  'dialogs/person_selector.rs',
+  'dialogs/preferences.rs',
+  'dialogs/recording_editor.rs',
+  'dialogs/recording_selector.rs',
+  'dialogs/section_editor.rs',
+  'dialogs/track_editor.rs',
+  'dialogs/tracks_editor.rs',
+  'dialogs/work_editor.rs',
+  'dialogs/work_selector.rs',
+  'screens/ensemble_screen.rs',
+  'screens/mod.rs',
+  'screens/person_screen.rs',
+  'screens/recording_screen.rs',
+  'screens/work_screen.rs',
+  'widgets/list.rs',
+  'widgets/mod.rs',
+  'widgets/navigator.rs',
+  'widgets/person_list.rs',
+  'widgets/poe_list.rs',
+  'widgets/selector_row.rs',
+  'backend.rs',
+  'main.rs',
+  'resources.rs',
+  'resources.rs.in',
+  'window.rs',
+)
+
+cargo_script = find_program(join_paths(meson.source_root(), 'build-aux/cargo.sh'))
+cargo_release = custom_target(
+  'cargo-build',
+  build_by_default: true,
+  input: sources,
+  depends: resources,
+  output: meson.project_name(),
+  console: true,
+  install: true,
+  install_dir: get_option('bindir'),
+  command: [
+    cargo_script,
+    meson.build_root(),
+    meson.source_root(),
+    '@OUTPUT@',
+    get_option('buildtype'),
+    meson.project_name(),
+  ]
+)