feat(cli): stateful welcome screen + v0.1.4 bump

Running \`claudemesh\` with no args now detects install state and
prints context-appropriate guidance: suggests \`install\` if MCP
not registered, \`join\` if no meshes, \`launch\` if ready.
Replaces the static HELP dump with a first-run wizard that meets
users where they are.

Static HELP still available via --help.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/cli/src/index.ts

@@ -18,6 +18,7 @@ import { runHook } from "./commands/hook";
 import { runLaunch } from "./commands/launch";
 import { runStatus } from "./commands/status";
 import { runDoctor } from "./commands/doctor";
+import { runWelcome } from "./commands/welcome";
 import { VERSION } from "./version";
 
 const HELP = `claudemesh v${VERSION} — peer mesh for Claude Code sessions
@@ -94,9 +95,11 @@ async function main(): Promise<void> {
     case "--help":
     case "-h":
     case "help":
-    case undefined:
       console.log(HELP);
       return;
+    case undefined:
+      runWelcome();
+      return;
     default:
       console.error(`Unknown command: ${cmd}`);
       console.error("Run `claudemesh --help` for usage.");