Add deploy helper script

Add a deploy script and npm commands, and include
Navbar updates as requested.

Signed-off-by: codex@lucy.xalior.com

package.json

@@ -7,6 +7,8 @@
     "build": "next build --turbopack",
     "start": "next start",
     "lint": "eslint",
+    "deploy": "bin/deploy.sh",
+    "deploy:branch": "bin/deploy.sh",
     "deploy-prod": "git push --set-upstream explorer.specnext.dev deploy",
     "deploy-test": "git push --set-upstream test.explorer.specnext.dev test"
   },