Added Swagger and TypeORM, added Hello World

package.json

@@ -19,18 +19,21 @@
     "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"
   },
-	  "dependencies": {
+  "dependencies": {
     "@nestjs/common": "^11.0.1",
     "@nestjs/core": "^11.0.1",
     "@nestjs/graphql": "^13.2.3",
     "@nestjs/mercurius": "^13.2.3",
     "@nestjs/platform-fastify": "^11.1.12",
+    "@nestjs/swagger": "^11.2.5",
     "fastify": "^5.7.2",
     "graphiql": "^5.2.2",
     "graphql": "^16.12.0",
     "mercurius": "^16.7.0",
+    "mysql2": "^3.16.2",
     "reflect-metadata": "^0.2.2",
-    "rxjs": "^7.8.1"
+    "rxjs": "^7.8.1",
+    "typeorm": "^0.3.28"
   },
   "devDependencies": {
     "@eslint/eslintrc": "^3.2.0",
@@ -56,8 +59,7 @@
     "typescript": "^5.7.3",
     "typescript-eslint": "^8.20.0"
   },
-
- "jest": {
+  "jest": {
     "moduleFileExtensions": [
       "js",
       "json",