chore: switch to flake-parts

flake.nix

@@ -3,7 +3,7 @@
 
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
-    flake-utils.url = "github:numtide/flake-utils";
+    flake-parts.url = "github:hercules-ci/flake-parts";
     fenix = {
       url = "github:nix-community/fenix";
       inputs.nixpkgs.follows = "nixpkgs";
@@ -12,17 +12,22 @@
   };
 
   outputs =
-    {
-      nixpkgs,
-      flake-utils,
+    inputs@{
+      flake-parts,
       fenix,
       naersk,
       ...
     }:
-    flake-utils.lib.eachDefaultSystem (
-      system:
+    flake-parts.lib.mkFlake { inherit inputs; } {
+      systems = [
+        "aarch64-linux"
+        "x86_64-linux"
+        "aarch64-darwin"
+        "x86_64-darwin"
+      ];
+      perSystem =
+        { system, pkgs, ... }:
         let
-        pkgs = import nixpkgs { inherit system; };
           naersk' = pkgs.callPackage naersk { };
           defaultBuildOpts = {
             cargo = fenix.packages.${system}.stable.cargo;
@@ -53,6 +58,6 @@
               }
             );
           };
-      }
-    );
+        };
+    };
 }

src/main.rs

@@ -1,6 +1,7 @@
 use cartographer::libcanvas::CanvasClient;
 use reqwest::{Error, Url};
 use std::env;
+use ui;
 
 #[tokio::main]
 async fn main() -> Result<(), Error> {

src/ui.rs

@@ -0,0 +1,22 @@
+use std::io;
+
+use ratatui::{
+    crossterm::event::{self, KeyCode, KeyEventKind},
+    style::Stylize,
+    widgets::Paragraph,
+    DefaultTerminal,
+};
+
+fn run(mut terminal: DefaultTerminal) -> io::Result<()> {
+    loop {
+        terminal.draw(|frame| {
+            let greeting = paragraph
+                .new("Hello Ratatui! (press 'q' to quit)")
+                .white()
+                .on_blue();
+            frame.render_widget(greeting, frame.area());
+            
+            if let event::Event::Key(key) -
+        })
+    }
+}