Added generate abc command

src/cpl_cli/templates/generate/abc_template.py

@@ -0,0 +1,22 @@
+import textwrap
+from string import Template
+
+
+class ABCTemplate:
+
+    @staticmethod
+    def get_abc_py(name: str) -> str:
+        string = textwrap.dedent("""\
+        from abc import ABC, abstractmethod
+
+
+        class $Name(ABC):
+        
+            @abstractmethod
+            def __init__(self): pass
+
+        """)
+
+        return Template(string).substitute(
+            Name=name
+        )