Added gemini api to power the app

app.py

@@ -10,13 +10,16 @@ def process(text1):
     return response.text
 
 def happy_tone(text2):
-  return text2+" with Happy tone"
+    response = model.generate_content(text2+" write it in a happy tone")
+    return response.text
 
 def sad_tone(text2):
-  return text2+" with Sad tone"
+    response = model.generate_content(text2+" write it in a sad tone")
+    return response.text
 
 def excited_tone(text2):
-  return text2+" with Excited tone"
+    response = model.generate_content(text2+" write it in a excited tone")
+    return response.text