feat: Track outbound links in plausible

Unlike mermaid.live, there is no user provided links in mermaid.js.org.
So we can track the outbound link clicks without leaking any user data.

packages/mermaid/src/docs/.vitepress/components/TopBar.vue

@@ -6,7 +6,7 @@
       <a
         href="https://www.mermaidchart.com/app/user/billing/checkout?coupon=HOLIDAYS2023"
         target="_blank"
-        class="unstyled text-white"
+        class="unstyled text-white plausible-event-name=bannerClick"
       >
         Get AI, team collaboration, storage, and more with
         <span class="font-bold underline"

packages/mermaid/src/docs/.vitepress/config.ts

@@ -31,7 +31,7 @@ export default defineConfig({
         defer: 'true',
         'data-domain': 'mermaid.js.org',
         // All tracked stats are public and available at https://p.mermaid.live/mermaid.js.org
-        src: 'https://p.mermaid.live/js/script.js',
+        src: 'https://p.mermaid.live/js/script.tagged-events.outbound-links.js',
       },
     ],
   ],