playbook: Add rapid.space-vps-base playbook

Having base playbook for Rapid.Space VPS servers is a good way to automate
common tasks on such servers.

playbook/rapid.space-vps-base.yml

+- name: Playbook to configure Rapid.Space VPS Base server
+  hosts: 127.0.0.1
+  connection: local
+
+  roles:
+    - rapid-space-vps-base