added style mimicking piepelines

data/raw/styling/sample_formal.jsonl

@@ -0,0 +1,5 @@
+{"text": "Hey, what's up? How are you doing today?", "styled_text": "Hello, how are you doing today?"}
+{"text": "This is really cool stuff!", "styled_text": "This is quite impressive material."}
+{"text": "I'm gonna go to the store later.", "styled_text": "I will go to the store later."}
+{"text": "What's the deal with this?", "styled_text": "What is the situation regarding this matter?"}
+{"text": "That's totally awesome!", "styled_text": "That is quite remarkable!"}

data/raw/styling/test_formal.jsonl

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+{"input": "Hey, what's up? How are you doing today?", "output": "Hello, how are you doing today?"}
+{"input": "This is really cool stuff!", "output": "This is quite impressive material."}
+{"input": "I'm gonna go to the store later.", "output": "I will go to the store later."}

data/raw/styling/test_missing_fields.jsonl

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+{"text": "Hello world", "styled_text": "Greetings, world."}
+{"styled_text": "This is a formal greeting."}
+{"text": "How are you?", "styled_text": "How are you doing?"}
+{"text": null, "styled_text": "Empty input example."}
+{"styled_text": "Another example with no input."}