refactor: moved SSH key management classes to separate file, added planned methods unimplemented for some classes

softman.py

@@ -126,7 +126,7 @@ class Software:
             delattr(app, key[1])
             setattr(self, key[0], app)
 
-    def list(self, contents: bool = False) -> tuple[str]:
+    def show(self, contents: bool = False) -> tuple[str]:
         apps: tuple[str] | tuple[Apps] = tuple(
             filter(
                 lambda a: isinstance(getattr(self, a), Apps),
@@ -151,4 +151,13 @@ class Software:
                 dir(self)
             )
         )
-        return len(apps)
+        return len(apps)
+
+    def __contains__(self):
+        raise NotImplementedError
+
+    def __missing__(self):
+        raise NotImplementedError
+
+    def __iter__(self):
+        raise NotImplementedError