Add ferdium role, prep for removing webcatalog

In the trend of 2023 enshitification webcatalog has decided to stop
shipping a Linux version so I'll be moving to fetdium with a self-hosted
server moving forwards.

roles/ferdium/tasks/main.yaml

@@ -0,0 +1,17 @@
+---
+- name: install homebrew package
+  when: ansible_os_family == 'Darwin'
+  homebrew_cask:
+    name: ferdium
+    state: latest
+
+- when: ansible_os_family == 'Windows'
+  win_chocolatey:
+    name: ferdium
+    state: latest
+
+- name: install flatpak package
+  when: ansible_os_family != 'Windows' and
+        ansible_os_family != 'Darwin'
+  flatpak:
+    name: org.ferdium.Ferdium