Optimize release builds (#51)

Cargo.toml

@@ -5,3 +5,9 @@ members = [
     "theseus_cli",
     "theseus_gui/src-tauri"
 ]
+
+# Optimize for speed and reduce size on release builds
+[profile.release]
+codegen-units = 1
+lto = true
+strip = true