feat(provider): implement a comprehensive subscription lifecycle in stripe

Implement a comprehensive subscription lifecycle within loopback4-billing to support
automatedrecurring billing, including subscription creation, upgrades and downgrades,
renewals,cancellations, and proration, ensuring consistency and scalability for SaaS monetization

Author: Piyush Singh Gaur

package-lock.json

@@ -24,7 +24,7 @@
     "eslint": "lb-eslint --report-unused-disable-directives .",
     "eslint:fix": "npm run eslint -- --fix",
     "pretest": "npm run build",
-    "test": "echo No Tests",
+    "test": "lb-mocha --allow-console-logs dist/__tests__/**/*.js",
     "posttest": "npm run lint",
     "test:dev": "lb-mocha --allow-console-logs dist/__tests__/**/*.js && npm run posttest",
     "prepublishOnly": "npm run test",
@@ -120,4 +120,4 @@
     ],
     "repositoryUrl": "git@github.com:sourcefuse/loopback4-billing.git"
   }
-}
+}