feat: Reorganizes some of the roles and renames some variables

roles/prepare-template-facts/tasks/main.yml

@@ -0,0 +1,15 @@
+---
+# This role is used internally to parse template variables, depending on
+# what is supplied.
+#
+- name: Set default template path.
+  ansible.builtin.set_fact:
+    repo_template_path: "{{ build_dir }}/template"
+
+- name: Parse template path.
+  ansible.builtin.set_fact:
+    template_dir: "{{ template.path | default(repo_template_path) }}"
+
+- name: Parse template vars path.
+  ansible.builtin.set_fact:
+    template_vars_path: "{{ template_dir }}/{{ template.vars | default('repo_vars') }}"