Add mermaid back in package.json

package.json

@@ -39,6 +39,7 @@
     "fuse.js": "^7.0.0",
     "jquery": "^3.7.1",
     "katex": "^0.16.9",
+    "mermaid": "^10.0.2",
     "packery": "^2.1.2",
     "prettier": "^3.2.5",
     "prettier-plugin-go-template": "^0.0.15",
@@ -52,6 +53,10 @@
   },
   "vendorCopy": [],
   "devVendorCopy": [
+    {
+      "from": "node_modules/mermaid/dist",
+      "to": "assets/lib/mermaid"
+    },
     {
       "from": "node_modules/chart.js/dist/chart.umd.js",
       "to": "assets/lib/chart/chart.min.js"
@@ -99,4 +104,4 @@
     "@tailwindcss/forms": "^0.5.7",
     "commander": "^12.0.0"
   }
-}
+}