Intro Exercise: Hello World

[f01d-zero]

Adds the first exercise. It teaches how to start a ratatui app 🧀.

The student uncomments ratatui::run(app) in main. The app draws "hello world" and exits on a key press.

Includes the reference solution and the info.toml entry.

[mo8it]

Uncommenting a line seems very boring, even for an introduction. What does the user learn out of this?

[f01d-zero]

I thought this would serve as a good introduction for users that didn't go through rustlings.

It also showcases the minimal structure of a ratatui app.

[orhun]

Yeah, I think we should do something else as the first exercise. Maybe we could give the user init and expect them to render a text instead?

[shadowmkj]

Would having the user render a simple Span be enough for a first exercise?
Also, how can we show live output of the TUI? will we have to build some rendering submodule?

[mo8it]

Also, how can we show live output of the TUI? will we have to build some rendering submodule?

The easiest option would be to run it in a Zellij pane. Rustlings would open a dedicated pane and replace it every time the code changes.

[orhun]

Would having the user render a simple Span be enough for a first exercise?

I think a Line would be better. It's probably more understandable than Span.