chore: bump version to 0.8.4 for npm registry

package.json

@@ -1,6 +1,6 @@
 {
   "name": "gims",
-  "version": "0.8.2-dev.2+20260128.2346.9eaa681.main",
+  "version": "0.8.4",
   "description": "Git Made Simple – AI‑powered git helper with smart insights, stats & code review",
   "author": "S41R4J",
   "license": "MIT",
@@ -43,4 +43,4 @@
     "test": "echo \"Enhanced GIMS v$(node -p \"require('./package.json').version\") - All systems operational!\"",
     "postinstall": "echo \"🚀 GIMS installed! Quick start: 'g setup --api-key gemini' then 'g s' to see status. Full help: 'g --help'\""
   }
-}
+}