fix: make mermaid.js store locally & remove duplicated import (#437)

* fix #408

* Use single local Mermaid load and keep initialization in head-end

Author: Swadeep006

package.json

@@ -20,5 +20,8 @@
     "autoprefixer": "^10.4.0",
     "postcss": "^8.3.7",
     "postcss-cli": "^9.0.2"
+  },
+  "dependencies": {
+    "mermaid": "^10.9.5"
   }
 }

themes/docsy/layouts/partials/hooks/head-end.html

@@ -3,7 +3,6 @@
 {{ end }}
 
 {{ if .Site.Params.mermaid.enable }}
-<script src="https://cdn.jsdelivr.net/npm/mermaid@10/dist/mermaid.min.js"></script>
 <script>
 document.addEventListener('DOMContentLoaded', function() {
     var codeBlocks = document.querySelectorAll('pre code.language-mermaid, code.language-mermaid, pre code.language-fallback, code.language-fallback');