switch to plantuml

package.json

@@ -9,7 +9,6 @@
   },
   "dependencies": {
     "@codemirror/lang-javascript": "^6.2.2",
-    "@codemirror/lang-yaml": "^6.0.2",
     "@uiw/react-codemirror": "^4.25.7",
     "@radix-ui/react-context-menu": "^2.2.16",
     "@radix-ui/react-menubar": "^1.1.16",
@@ -20,7 +19,6 @@
     "@xyflow/react": "^12.10.1",
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
-    "js-yaml": "^4.1.0",
     "lucide-react": "^0.577.0",
     "react": "18.2.0",
     "react-dom": "18.2.0",
@@ -29,7 +27,6 @@
     "tailwindcss-animate": "^1.0.7"
   },
   "devDependencies": {
-    "@types/js-yaml": "^4.0.9",
     "@types/node": "^25.3.3",
     "@types/react": "^18.0.0",
     "@types/react-dom": "^18.0.0",