First try of implementing database

src/main.rs

@@ -1,12 +1,17 @@
+mod database;
 mod mcdu;
 mod sheet_listing;
 
 use std::{env, path::PathBuf, process};
 
+use database::Database;
 use gtk::prelude::*;
 use mcdu::McduModel;
 use relm4::prelude::*;
 use sheet_listing::{SheetListingInput, SheetListingModel};
+use tokio::io::{AsyncReadExt, AsyncWriteExt};
+
+use crate::database::Sheet;
 
 struct AppModel {
     mcdu: Controller<McduModel>,
@@ -89,7 +94,18 @@ impl SimpleComponent for AppModel {
     }
 }
 
-fn main() {
+#[tokio::main]
+async fn main() {
+    dotenvy::dotenv().unwrap();
+
+    let mut database = Database::new();
+    database.init_connection("./testdb.db").await.unwrap();
+    database.setup_db().await.unwrap();
+
+    database.insert_sheet(Sheet::new_debug()).await.unwrap();
+    let sheets = database.fetch_all_sheets().await.unwrap();
+    println!("Sheets: {:?}", sheets);
+
     let app = RelmApp::new("de.frajul.sheet-organizer");
 
     let args: Vec<String> = env::args().collect();