Migrate sshd to clanServices

- migrate service
- add deprecation notice to old module
- add check
- update docs

clanModules/sshd/README.md

@@ -1,7 +1,7 @@
 ---
 description = "Enables secure remote access to the machine over ssh."
 categories = ["System", "Network"]
-features = [ "inventory" ]
+features = [ "inventory", "deprecated" ]
 ---
 
 This module will setup the opensshd service.