feat: Show diagnostics in yaml instead of json (#1550)

* feat: Show diagnostics in YAML instead of JSON

* Adding missing semicolon

package.json

@@ -30,6 +30,7 @@
     "embla-carousel": "^8.1.4",
     "embla-carousel-wheel-gestures": "^8.0.1",
     "home-assistant-js-websocket": "^9.4.0",
+    "js-yaml": "^4.1.0",
     "keycharm": "^0.4.0",
     "lit": "^3.1.4",
     "lodash-es": "^4.17.21",
@@ -61,6 +62,7 @@
     "@rollup/plugin-terser": "^0.4.4",
     "@rollup/plugin-typescript": "^11.1.6",
     "@semantic-release/github": "^10.3.3",
+    "@types/js-yaml": "^4",
     "@types/lodash-es": "^4.17.12",
     "@types/masonry-layout": "^4.2.8",
     "@typescript-eslint/eslint-plugin": "^7.13.0",