refactor(create-sei): extract lib and expand test coverage

Author: codebycarson

packages/create-sei/src/main.ts

@@ -4,7 +4,6 @@ import { Command } from "commander";
 import { listExtensions, runWizard, type WizardOptions } from "./lib.js";
 
 const program = new Command();
-
 program
 	.command("app")
 	.description("Create a new SEI dApp")