After setting up the Cargo project in Devlog #1, I wanted to give my Nodes
some real identity. I replaced the simple struct with an enum that has four
variants: EventNode, FlowNode, WorkerNode, and IfElseNode. Each type now
has its own run behavior.

I also added a web server (tiny_http) that serves JSON instead of just
printing to the console. This means my future website will be able to
fetch data from the backend easily.

Next steps:

• Login system with tokens and passwords
• Build the actual frontend website
• Flow save/load ٩(◕‿◕｡)۶