fix(cli): add missing immer dependency for zustand

Author: brandonkachen

bun.lock

@@ -33,6 +33,7 @@
     "@opentui/core": "github:CodebuffAI/opentui#codebuff/custom",
     "@opentui/core-darwin-arm64": "0.1.26",
     "@opentui/react": "github:CodebuffAI/opentui#codebuff/custom",
+    "immer": "^10.1.3",
     "react": "^19.0.0",
     "react-reconciler": "^0.32.0",
     "remark-parse": "^11.0.0",