refactor: remove useless folders

apps/email-playground/package.json

@@ -10,15 +10,11 @@
     "typecheck": "tsc --noEmit --emitDeclarationOnly false"
   },
   "dependencies": {
-    "@konobangu/email": "workspace:*",
     "@react-email/components": "0.0.31",
     "react": "^19.0.0",
     "react-email": "3.0.4"
   },
   "devDependencies": {
-    "@konobangu/typescript-config": "workspace:*",
-    "@types/node": "22.10.1",
-    "@types/react": "19.0.1",
-    "typescript": "^5.7.3"
+    "@types/react": "19.0.1"
   }
 }

apps/email-playground/tsconfig.json

@@ -1,5 +1,9 @@
 {
-  "extends": "@konobangu/typescript-config/nextjs.json",
+  "extends": "../../tsconfig.base.json",
+  "compilerOptions": {
+    "composite": true,
+    "jsx": "react-jsx"
+  },
   "include": ["**/*.ts", "**/*.tsx"],
   "exclude": ["node_modules"]
 }