[AUR-390] Add prompt template and prompt component (#24)

* Export pipeline to config

* Export the input to config

* Preliminary creating UI dynamically

* Add test for config export

* Try out prompt UI

* Add example projects

* Fix test errors

* Standardize interface for retrieval

* Finalize the UI demo

* Update README.md

* Update README

* Refactor according to main

* Fix typing issue

* Add openai key to git-secret

* Add prompt template and prompt component

* Update test

* update tests

* revert docstring

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Co-authored-by: trducng <trungduc1992@gmail.com>
Co-authored-by: Nguyen Trung Duc (john) <john@cinnamon.is>

knowledgehub/post_processing/extractor.py

@@ -6,7 +6,8 @@ from kotaemon.documents.base import Document
 
 
 class RegexExtractor(BaseComponent):
-    """Simple class for extracting text from a document using a regex pattern.
+    """
+    Simple class for extracting text from a document using a regex pattern.
 
     Args:
         pattern (str): The regex pattern to use.