AI/Prompt-Driven Blueprints

### Description

Mostly a discussion point to start here, but with our Blueprint architecture, and now enabling previews of Blueprints without the need for a full NR-instance, could we open up a text box and let users ask an LLM to generate Node-RED flows for them as a starting point based on a given prompt, e.g. "Create me a CRUD API"

ChatGPT for example would struggle with Dashboard-based content given how new it is, we could look at training our own, but source flows would be a challenge

### Which customers would this be available to

None
```[tasklist]
### Design
- [ ] https://github.com/FlowFuse/flowfuse/issues/3916
```

```[tasklist]
### Development
- [ ] https://github.com/FlowFuse/flowfuse/issues/3921
- [ ] https://github.com/FlowFuse/flowfuse/issues/3922
- [ ] https://github.com/FlowFuse/website/issues/2229
```