fix: load CLI version from package.json

src/cli.ts

@@ -1,5 +1,6 @@
 #!/usr/bin/env bun
 import { Command } from "commander";
+import pkg from "../package.json";
 import { cleanupMultiModel } from "./core/cleanup";
 import { closeMultiModel } from "./core/close";
 import { openMultiModel } from "./core/open";
@@ -10,7 +11,7 @@ const program = new Command();
 program
   .name("opencode-multi-model")
   .description("Launch multiple OpenCode models in tmux sessions")
-  .version("1.0.0");
+  .version(pkg.version);
 
 program
   .command("open")