feat(packages): If yq-go is installed make it callable as yq

Means it can be overwritten, is defined in a single place, and easier to
invoke from individual tasks (if invoking from multiple).

group_vars/headless.yaml

@@ -65,6 +65,7 @@ packages_terminal:
   - wlopm
   - wlsunset
   - wtype
+  - yq-go
   - yt-dlp
   - zk
   - zoxide

roles/packages/defaults/main.yaml

@@ -1,2 +1,4 @@
+all_packages_to_install: "{{ lookup('community.general.merge_variables', '^packages_.*') }}"
+
 custom_repositories:
   - https://marty-oehme.github.io/void-templates

roles/packages/tasks/main.yaml

@@ -9,5 +9,13 @@
 
 - name: Install all my used void packages
   community.general.xbps:
-    name: "{{ lookup('community.general.merge_variables', '^packages_.*') }}"
+    name: all_packages_to_install
     state: "{{ desired_package_state | default('present') }}"
+
+- name: Ensure yq binary points to the yq-go version
+  ansible.builtin.file:
+    src: "/usr/bin/yq-go"
+    dest: "/usr/bin/yq"
+    state: link
+  when: "'yq-go' in all_packages_to_install"
+  tags: sut