basic installs working

need to run tests on all the builds alone, should use a container system

tasks/helpers/cargo.yml

@@ -1,4 +1,11 @@
 # vim: set filetype=yaml.ansible
+#
+## Helper: cargo.yml
+## Description: Install packages using the cargo command
+## Variables: top level 'dict'
+##   name: package name on cargo
+##   version: cargo version, omitted if empty
+##   locked: _bool_, optional. Default false
 ---
 - name: Dump install vars
   ansible.builtin.debug: