chore: B1 모노레포 스캐폴드 스켈레톤 (yakcloud-packages)

- pnpm+turbo workspace, tsconfig base, .npmrc(Gitea 레지스트리)
- 7 패키지 스텁(ds-sdk 리프 → ui/api-client type-only → client-shell/bff-kit; backup-core 신규)
  package.json 의존으로 DAG·역의존 금지 규칙 강제
- Apache-2.0 LICENSE + NOTICE/LOGO_ATTRIBUTION(벤더 상표 로고 미번들, URL-only)
- .gitea/workflows/ci.yml(build/typecheck/lint · bind-env-drift · secret-scan · standalone-smoke)
- scripts: bind-env-check(check-only 게이트) · standalone-smoke(lazy-require 불변식) 스켈레톤
- apps/ds-web standalone 데모 스텁

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

packages/client-shell/package.json

@@ -0,0 +1,35 @@
+{
+  "name": "@yakcloud/client-shell",
+  "version": "0.0.0",
+  "description": "9종 데이터소스 웹 클라 셸(신규): 헤더/탭/pane/가드. FileBrowser 는 Phase 1.",
+  "license": "Apache-2.0",
+  "type": "module",
+  "main": "./dist/index.js",
+  "types": "./dist/index.d.ts",
+  "exports": {
+    ".": {
+      "types": "./dist/index.d.ts",
+      "import": "./dist/index.js"
+    }
+  },
+  "files": [
+    "dist"
+  ],
+  "publishConfig": {
+    "registry": "https://gitea.yakenator.io/api/packages/yakcloud/npm/"
+  },
+  "scripts": {
+    "build": "tsc -b",
+    "typecheck": "tsc --noEmit",
+    "lint": "eslint src",
+    "test": "echo \"(no tests yet)\""
+  },
+  "dependencies": {
+    "@yakcloud/ui": "workspace:*",
+    "@yakcloud/api-client": "workspace:*",
+    "@yakcloud/ds-sdk": "workspace:*"
+  },
+  "peerDependencies": {
+    "react": ">=18"
+  }
+}