feat: add workspace skeleton and server configuration validation

bin/src/main.rs

@@ -0,0 +1,16 @@
+use std::process::ExitCode;
+
+use clap::Parser;
+
+use itsybitsy::cli::Cli;
+
+fn main() -> ExitCode {
+    let cli = Cli::parse();
+    match itsybitsy::run(&cli) {
+        Ok(()) => ExitCode::SUCCESS,
+        Err(err) => {
+            eprintln!("itsybitsy: {err:#}");
+            ExitCode::FAILURE
+        }
+    }
+}