[zamok] Install Weechat from custom repository

Signed-off-by: Yohann D'ANELLO <ynerant@crans.org>

roles/zamok-tools/tasks/main.yml

 ---
+- name: Import GPG public key of Weechat repository
+  apt_key:
+    url: https://weechat.org/dev/info/debian_repository_signing_key/
+    state: present
+    keyring: /etc/apt/trusted.gpg.d/weechat.gpg
+
+- name: Install custom repository for Weechat sources
+  apt_repository:
+    repo: "deb https://weechat.org/debian {{ ansible_distribution_release }} main"
+    state: present
+
 - name: Install zamok tools
   apt:
     update_cache: true