Code and article need reviewed

[ScottS2017]

There are many things that need worked on with this:

• There are many backslashes don't belong and cause errors.
• There are many misspellings are easily shown by the IDE.
• There is not enough information about how to use the URL from Neon to get the parts needed for the .env file.
• homepage.dart line 102: "valueListenable: queryNotifierProvider.messageState," is wrong. You refactored QueryNotifier so that messageState doesn't exist anymore. I believe you may have changed it to queryAndResponseState, since this fixes the error.
• OpenAI doesn't allow embeddings to be generated by the babbage-002 model anymore. The model used in getQueryEnbeddings needs to be text-embedding-3-large, text-embedding-3-small, or text-embedding-ada-002
• After fixing all of this, the very first time I tried to use the app I got an error from OpenAI: "You exceeded your current quota, please check your plan and billing details...". What kind of account do we need to run this?
• This whole tutorial might be better off being refactored to use Gemini now, especially considering the quota issue.

I posted all of this as a comment but apparently comments are either broken or turned off. I imagine that if comments were working you would have found out about all of this months ago. Sorry if this comes off as salty but I just lost a day and, though I did learn some things, I never did get the app to run.