feat(marketplace): add beautiful-mermaid skill

Add beautiful-mermaid to the skills marketplace:
- Render Mermaid diagrams as beautiful SVGs or ASCII art
- 5 diagram types: flowchart, sequence, class, ER, state
- 15 built-in themes + Shiki/VS Code theme integration
- Zero DOM dependencies, works in Node.js/Bun/Deno/browsers

Source: rohitg00/beautiful-mermaid

Author: rohitg00

marketplace/skills.json

@@ -1,8 +1,8 @@
 {
   "$schema": "./schema.json",
   "version": 1,
-  "updatedAt": "2026-01-26",
-  "totalSkills": 15064,
+  "updatedAt": "2026-02-02",
+  "totalSkills": 15065,
   "curatedCollections": 31,
   "skills": [
     {
@@ -33112,6 +33112,23 @@
         "k8s"
       ]
     },
+    {
+      "id": "rohitg00/beautiful-mermaid/beautiful-mermaid",
+      "name": "Beautiful Mermaid",
+      "description": "Render Mermaid diagrams as beautiful SVGs or ASCII art. 5 diagram types, 15 themes, Shiki integration, zero DOM dependencies.",
+      "source": "rohitg00/beautiful-mermaid",
+      "tags": [
+        "mermaid",
+        "diagrams",
+        "visualization",
+        "flowchart",
+        "sequence",
+        "uml",
+        "ascii",
+        "svg",
+        "themes"
+      ]
+    },
     {
       "id": "itsmostafa/aws-agent-skills/cognito",
       "name": "Cognito",