reorganizing configuration

- static package configuration in `vars/pkgs`
  - loaded into the variable `pkgconfig` as part of `tasks/main.yml`

tasks/pkgs/air.yml

@@ -1,9 +1,7 @@
 # vim: set filetype=yaml.ansible :
 ---
-- ansible.builtin.include_tasks:
-    file: pkgs/go.yml
-  when: pkgconfig_go is undefined
-
-- name: add to gopkgs
+- name: Add to go_pkgs
+  notify:
+    - Depend go
   ansible.builtin.set_fact:
-    gopkgs: "{{ gopkgs + ['github.com/air-verse/air@latest'] }}"
+    go_pkgs: "{{ go_pkgs + [air.pkg] }}"