Add an Eco Chat page

[MrCsabaToth]

We've got the following judge feedback from the Climate Change-Makers 2024 judges:

• The problem identified is very valid. Gamification attracts people and is a good idea to engage them. However, trivias aren't the best option in gamification as the literature shows they aren't the best option when it comes to sustaining interest.
• The judges mentioned that it would be nice to hear more in regards to the problem and how this sort of solution would make a meaningful impact within a community. They thought that simplifying complex issues associated with climate change into a fun and interactive game was a great idea to start conversations and solutions regarding it.
• The judges thought that the development progress on the product was very impressive given the timeframe though they recommended putting a focus on it’s impact/purpose just as much as the technical build.

Based on that it'd be good to expand the capabilities beyond trivia / quiz. One straight forward extension would be a chat, also RAG-ed by the same dataset what the quiz uses (but it could also veer off outside of those documents). A generic Eco Chat like the https://devpost.com/software/eco-oracle can provide. For that:

1. Modify the Eco Oracle script back to be a generic Eco chat script (right now it's eco quiz like due to experiments)
2. Develop a chat UI for that agent in the FlutterFlow app.

[MrCsabaToth]

@TastyMeat did the majority of the work, I just adjusted a little the API back-end call and added a little shim to convert the raw response text to the JSON format matching ChatGPT (a "content" field)