feat!: allow executing code after loading script

src/arguments.rs

@@ -6,7 +6,11 @@ use std::path::PathBuf;
 #[derive(Parser)]
 #[command(version = build_info::version_formatted())]
 pub struct Arguments {
-    /// Path to main Lua file
+    /// Path to Lua entrypoint
     #[arg(short, long)]
     pub script: Option<PathBuf>,
+
+    /// Code to execute after loading script
+    #[arg(short, long)]
+    pub exec: Option<String>,
 }