[studio] Add subcommands output on invalid subcommand dispatch

src/olympic/applib/applib.cpp

@@ -77,7 +77,7 @@ int main(int const argc, char const **argv) {
 			OLYMPIC_PROJECT_DATADIR,
 			{argv, static_cast<size_t>(argc)});
 	oxAssert(err, "Something went wrong...");
-	if (err) {
+	if (ox::defines::Debug && err) {
 		oxErrf("Failure: {}\n", toStr(err));
 	}
 	return static_cast<int>(err);

src/olympic/studio/applib/src/app.cpp

@@ -116,6 +116,20 @@ static ox::Error runStudio(
 	return err;
 }
 
+static void listCmds() noexcept {
+	oxOut("Insufficient arguments for sub-command\n\nValid commands:\n\n");
+	for (auto const m : modules()) {
+		if (m->commands().empty()) {
+			continue;
+		}
+		oxOutf("\t{}\n", m->id());
+		for (auto const &c : m->commands()) {
+			oxOutf("\t\t{}\n", c.name);
+		}
+		oxOut("\n");
+	}
+}
+
 static ox::Error run(
 		ox::StringViewCR appName,
 		ox::StringViewCR projectDataDir,
@@ -130,7 +144,8 @@ static ox::Error run(
 	});
 	if (args.size() > 1 && ox::StringView{args[1]} == "cmd") {
 		if (args.size() < 5) {
-			return ox::Error{1, "insufficient arguments for sub-command"};
+			listCmds();
+			return ox::Error{1};
 		}
 		auto constexpr numCmdArgs = 5;
 		ox::StringView const projectDir = args[2];