presets for some startingpoints added

src/main.rs

@@ -18,7 +18,7 @@ use crossterm::{
     execute,
     terminal::{EnterAlternateScreen, LeaveAlternateScreen, disable_raw_mode, enable_raw_mode},
 };
-use db::Database;
+use db::{Database, Preset};
 use ratatui::{Terminal, backend::CrosstermBackend};
 
 #[derive(Debug, Parser)]
@@ -34,6 +34,9 @@ struct Args {
     /// Populate a new document with representative items
     #[arg(long)]
     demo: bool,
+    /// Initialize a new document with a complete example workspace
+    #[arg(long, value_enum, conflicts_with = "demo")]
+    preset: Option<Preset>,
     /// Import a text or iCalendar (.ics) file, then exit
     #[arg(long)]
     import: Option<PathBuf>,
@@ -58,6 +61,9 @@ fn main() -> Result<()> {
     if args.demo {
         db.seed_demo()?;
     }
+    if let Some(preset) = args.preset {
+        db.apply_preset(preset)?;
+    }
     if let Some(import) = args.import {
         let count = db.import_path(&import)?;
         println!("Imported {count} item(s) into {}", path.display());