feat: show greeting message

Author: chenjiahan

src/cli/index.ts

@@ -13,10 +13,23 @@ function initNodeEnv(command: string | undefined) {
   }
 }
 
+function showGreeting() {
+  // Ensure consistent spacing before the greeting message.
+  // Different package managers handle output formatting differently - some automatically
+  // add a blank line before command output, while others do not.
+  const { npm_execpath, npm_lifecycle_event, NODE_RUN_SCRIPT_NAME } = process.env;
+  const isNpx = npm_lifecycle_event === 'npx';
+  const isBun = npm_execpath?.includes('.bun');
+  const isNodeRun = Boolean(NODE_RUN_SCRIPT_NAME);
+  const prefix = isNpx || isBun || isNodeRun ? '\n' : '';
+  logger.greet(`${prefix}Rstack v${RSTACK_VERSION}\n`);
+}
+
 export function runCLI(): void {
   const command = argv[2];
 
   initNodeEnv(command);
+  showGreeting();
 
   try {
     setupCommands();