Reviewed-on: https://git.nationtech.io/NationTech/harmony/pulls/59 Co-authored-by: Jean-Gabriel Gill-Couture <jg@nationtech.io> Co-committed-by: Jean-Gabriel Gill-Couture <jg@nationtech.io>
Adds a quick demo command using `cargo run -p example-tui` to launch a minimalist TUI with demo scores. Also includes a core architecture diagram and overview in the README for better understanding of the project structure.
