Install examples

Examples are useful as part of the documentation, so they should be
available when installing Emeus.

examples/meson.build

@@ -1,2 +1,14 @@
+examples = [
+  'simple-grid.c',
+  'simple-grid.js',
+  'centered.js',
+]
+
+examples_dir = get_option('datadir') + '/emeus-@0@/examples'.format(emeus_api_version)
+
+install_data(examples, install_dir: examples_dir)
+
 executable('simple-grid', 'simple-grid.c',
-           dependencies: [ gtk_dep, emeus_dep ])
+           dependencies: [ gtk_dep, emeus_dep ],
+           install: true,
+           install_dir: examples_dir)