Add PromptComponent to langflow prompts

src/backend/langflow/components/prompts/Prompt.py

@@ -0,0 +1,28 @@
+from langchain_core.prompts import PromptTemplate
+from langflow import CustomComponent
+from langflow.field_typing import Prompt, TemplateField, Text
+
+
+class PromptComponent(CustomComponent):
+    display_name: str = "Prompt"
+    description: str = "A component for creating prompts using templates"
+    beta = True
+
+    def build_config(self):
+        return {
+            "template": TemplateField(display_name="Template"),
+            "code": TemplateField(advanced=True),
+        }
+
+    def build(
+        self,
+        template: Prompt,
+        **kwargs,
+    ) -> Text:
+        prompt_template = PromptTemplate.from_template(template)
+        try:
+            formated_prompt = prompt_template.format(**kwargs)
+        except Exception as exc:
+            raise ValueError(f"Error formatting prompt: {exc}") from exc
+        self.status = f'Prompt: "{formated_prompt}"'
+        return formated_prompt