feat(billing): align codebase with existing project structure

Author: Sourav-kashyap

package-lock.json

@@ -29,9 +29,9 @@
   "overrides": {
     "semver": "^7.5.2",
     "qs": "^6.14.1",
-    "form-data": "4.0.4",
+    "form-data": "4.0.6",
     "underscore": "1.13.8",
-    "undici": "7.24.0"
+    "undici": "8.5.0"
   },
   "config": {
     "commitizen": {