Add metainfo.yaml to enable API docs generation

metainfo.yaml

+maintainer: vkrause
+description: OSM indoor map QML component
+tier: 2
+type: functional
+platforms:
+    - name: Linux
+    - name: FreeBSD
+    - name: Windows
+    - name: MacOSX
+    - name: Android
+portingAid: false
+deprecated: false
+release: true
+libraries:
+ - cmake: KOSMIndoorMap
+cmakename: KOSMIndoorMap
+
+public_lib: true

metainfo.yaml.license

+SPDX-FileCopyrightText: none
+SPDX-License-Identifier: CC0-1.0