chore: add node-pty and tsx deps, PTY test directory structure

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

packages/runtime-tests/integration/pty/fixtures/tsconfig.json

@@ -0,0 +1,11 @@
+{
+  "compilerOptions": {
+    "jsx": "react-jsx",
+    "jsxImportSource": "vue",
+    "module": "nodenext",
+    "moduleResolution": "nodenext",
+    "target": "esnext",
+    "strict": true,
+    "skipLibCheck": true
+  }
+}

packages/runtime-tests/package.json

@@ -13,7 +13,9 @@
     "@vue-tui/runtime": "workspace:*",
     "@vue-tui/testing": "workspace:*",
     "chalk": "catalog:",
+    "node-pty": "catalog:",
     "strip-ansi": "catalog:",
+    "tsx": "catalog:",
     "typescript": "^6.0.3",
     "vite-plus": "^0.1.22",
     "vue": "^3.5.34"