roles/fileserver: Deploy Samba file server

The *fileserver* role configures Samba as a file sharing server. It uses
the *samba* role to handle cross-distribution installation of Samba
itself, and is focused primarily on configuring shared folders.

roles/fileserver/handlers/main.yml

@@ -0,0 +1,2 @@
+- name: save firewalld configuration
+  command: firewall-cmd --runtime-to-permanent