updating documentation

- giving things a better structure
- better documentation with the way things need to be as a standard

tasks/helpers/cargo.yml

@@ -1,11 +1,10 @@
 # vim: set filetype=yaml.ansible
 ---
-- name: Install cargo {{ pkg }}
-  become: "{{ ext_become }}"
-  environment:
-    RUSTONIG_SYSTEM_LIBONIG: 1
+- name: Install cargo
+  become: "{{ install_become }}"
+  become_user: "{{ install_become_user }}"
   community.general.cargo:
     name: "{{ pkg.name | default(pkg) }}"
-    version: "{{ pkg.vers | default(omit) }}"
-    path: "{{ path.cargo | default(path.prefix) }}"
-    locked: "{{ pkg.locked | default(omit) }}"
+    version: "{{ pkg.version | default(omit) }}"
+    locked: "{{ pkg.locked | default(false) }}"
+    path: "{{ install_prefix }}"