fix formatting, complete clangd system install

tasks/pkgs/cargo.yml

@@ -1,4 +1,10 @@
 # vim: set filetype=yaml.ansible :
+#
+## Package: cargo
+## Description: the Rust package manager
+## Version: system
+## Methods: system
+## Helpers: -
 ---
 - name: Set default cargo values
   ansible.builtin.set_fact: