fix(deps): add express-rate-limit to production dependencies

express-rate-limit was imported in auth-middleware.ts but only the
@types/express-rate-limit package was declared in devDependencies.
This caused "Cannot find module 'express-rate-limit'" error when
running `ccs config` after installing v7.20.0 globally.

Closes #333

bun.lock

@@ -10,6 +10,7 @@
         "chokidar": "^3.6.0",
         "cli-table3": "^0.6.5",
         "express": "^4.18.2",
+        "express-rate-limit": "^8.2.1",
         "express-session": "^1.18.2",
         "get-port": "^5.1.1",
         "gradient-string": "^2.0.2",

package.json

@@ -87,6 +87,7 @@
     "chokidar": "^3.6.0",
     "cli-table3": "^0.6.5",
     "express": "^4.18.2",
+    "express-rate-limit": "^8.2.1",
     "express-session": "^1.18.2",
     "get-port": "^5.1.1",
     "gradient-string": "^2.0.2",