complete more pkgs

- bitwarden is configured to install the cask on macos and the appimage
  on linux
- dbeaver is configured using the flatpak installation
- added handling of flatpaks

tasks/pkgs/flatpak.yml

@@ -0,0 +1,6 @@
+---
+- name: append to syspkgs
+  ansible.builtin.set_fact:
+    syspkgs: "{{ syspkgs + [ 'flatpak' ] }}"
+    pkgconfig_flatpak: {defined: true}
+  when: ansible_os_family != 'Darwin'