Refactor code structure and dependencies

package.json

@@ -19,11 +19,13 @@
     "test:watch": "jest --watch",
     "test:cov": "jest --coverage",
     "test:debug": "node --inspect-brk -r tsconfig-paths/register -r ts-node/register node_modules/.bin/jest --runInBand",
-    "test:e2e": "jest --config ./test/jest-e2e.json"
+    "test:e2e": "jest --config ./test/jest-e2e.json",
+    "codegen": "graphql-codegen --config codegen.ts"
   },
   "dependencies": {
     "@apollo/server": "^4.11.0",
     "@graphql-codegen/cli": "^5.0.2",
+    "@graphql-codegen/introspection": "^4.0.3",
     "@graphql-codegen/typescript": "^4.0.9",
     "@graphql-codegen/typescript-operations": "^4.2.3",
     "@graphql-codegen/typescript-resolvers": "^4.2.1",
@@ -78,7 +80,10 @@
     "ts-node": "^10.9.1",
     "tsconfig-paths": "^4.2.0",
     "typescript": "^5.1.3",
-    "ws": "^8.18.0"
+    "ws": "^8.18.0",
+    "@graphql-codegen/typescript-resolvers": "4.2.1",
+    "@graphql-codegen/typescript": "4.0.9",
+    "@graphql-codegen/cli": "5.0.2"
   },
   "jest": {
     "moduleFileExtensions": [
@@ -97,4 +102,4 @@
     "coverageDirectory": "../coverage",
     "testEnvironment": "node"
   }
-}
+}