🎉 feat(formatter): add base FieldFormatter class for formatting template fields

The base.py file is a new addition to the project. It introduces the FieldFormatter class, which is an abstract base class (ABC) for formatting template fields. This class provides a format() method that takes a TemplateField object as input and is meant to be implemented by subclasses. This addition allows for the creation of custom field formatters in the project.

src/backend/langflow/template/frontend_node/formatter/base.py

@@ -0,0 +1,9 @@
+from abc import ABC, abstractmethod
+
+from langflow.template.field.base import TemplateField
+
+
+class FieldFormatter(ABC):
+    @abstractmethod
+    def format(self, field: TemplateField):
+        pass