Added Arch, Flatpak & RPM package files

pkgs/flatpak/com.github.rafostar.Clapper.yml

@@ -0,0 +1,23 @@
+app-id: com.github.rafostar.Clapper
+runtime: org.gnome.Platform
+runtime-version: 3.36
+sdk: org.gnome.Sdk
+command: com.github.rafostar.Clapper
+finish-args:
+  - --share=ipc
+  - --socket=fallback-x11
+  - --socket=wayland
+  - --device=dri
+  - --filesystem=xdg-videos
+  - --socket=pulseaudio
+  - --share=network
+
+# maybe add additinal codecs?
+
+modules:
+  - name: clapper
+    buildsystem: meson
+    sources:
+      - type: git
+        url: https://github.com/Rafostar/clapper.git
+        commit: 22e8e443162825f00666ca6898be3e868a3c0749