feat: add placeholder packages (core, api, api-client, cms-core, cms-client, ui)

packages/core/package.json

@@ -0,0 +1,18 @@
+{
+  "name": "@repo/core",
+  "private": true,
+  "version": "0.0.0",
+  "type": "module",
+  "main": "./src/index.ts",
+  "types": "./src/index.ts",
+  "scripts": {
+    "build": "tsc --noEmit",
+    "lint": "eslint .",
+    "test": "vitest run",
+    "typecheck": "tsc --noEmit"
+  },
+  "devDependencies": {
+    "@repo/eslint-config": "workspace:*",
+    "@repo/typescript-config": "workspace:*"
+  }
+}

packages/core/src/index.ts

@@ -0,0 +1,3 @@
+// @repo/core — Clean Architecture core package
+// Layers: entities, application, infrastructure, interface-adapters, di
+export {};

packages/core/tsconfig.json

@@ -0,0 +1,12 @@
+{
+  "extends": "@repo/typescript-config/base.json",
+  "compilerOptions": {
+    "baseUrl": ".",
+    "paths": {
+      "@/*": ["./src/*"]
+    },
+    "types": ["reflect-metadata"]
+  },
+  "include": ["src/**/*.ts"],
+  "exclude": ["node_modules", "dist"]
+}