Introduce a Higher-Level Collection Skeleton

[andreashaerter]

The existing collection_default structure is designed for collections at the "function" or "provider" level, primarily for shipping single roles as .run. Think of the following examples:

• foundata.firewalld
• foundata.ufw
• foundata.iptables

It would be beneficial to introduce another skeleton at a higher level, allowing for the creation of collections that build upon these function/provider-based collections through dependencies.

For instance, a foundata.firewall collection could depend on:

• foundata.firewalld.run
• foundata.ufw.run
• foundata.iptables.run

Additionally, this higher-level collection could provide reasonable provider-to-OS defaults and other useful configurations.