build: Add meson build system

Reuse the generated dbus interface .xml files from fprintd to avoid
unnecessary copies.

doc/meson.build

@@ -0,0 +1,27 @@
+subdir('dbus')
+
+version_file = configure_file(
+    input: 'version.xml.in',
+    output: 'version.xml',
+    configuration: configuration_data({
+        'VERSION': meson.project_version(),
+    }),
+)
+
+gnome.gtkdoc(meson.project_name(),
+    main_xml: 'fprintd-docs.xml',
+    src_dir: meson.source_root() / 'src',
+    dependencies: [
+        declare_dependency(
+            sources: dbus_interfaces_refs,
+            link_with: libfprintd_private,
+        ),
+    ],
+    content_files: [
+        version_file,
+        dbus_interfaces_refs,
+    ],
+    ignore_headers: [
+        'config.h',
+    ],
+    install: true)