chore: sync generated files and fix agentmail metadata

- Fixed agentmail/SKILL.md description (was 305 chars, now concise)
- Added risk: safe and source: community labels
- Regenerated skills_index.json (970 skills)
- Updated README.md with latest skill count
- Regenerated CATALOG.md, data/catalog.json, data/bundles.json

Post-merge fixes for PR #183 following MAINTENANCE.md procedures.

data/bundles.json

@@ -6,6 +6,7 @@
       "skills": [
         "3d-web-experience",
         "agent-framework-azure-ai-py",
+        "agentmail",
         "algolia-search",
         "android-jetpack-compose-expert",
         "android_ui_verification",

data/catalog.json

@@ -1,6 +1,6 @@
 {
   "generatedAt": "2026-02-08T00:00:00.000Z",
-  "total": 969,
+  "total": 970,
   "skills": [
     {
       "id": "00-andruia-consultant",
@@ -460,6 +460,30 @@
       ],
       "path": "skills/agentfolio/SKILL.md"
     },
+    {
+      "id": "agentmail",
+      "name": "agentmail",
+      "description": "Email infrastructure for AI agents. Create accounts, send/receive emails, manage webhooks, and check karma balance via the AgentMail API.",
+      "category": "data-ai",
+      "tags": [
+        "agentmail"
+      ],
+      "triggers": [
+        "agentmail",
+        "email",
+        "infrastructure",
+        "ai",
+        "agents",
+        "accounts",
+        "send",
+        "receive",
+        "emails",
+        "webhooks",
+        "check",
+        "karma"
+      ],
+      "path": "skills/agentmail/SKILL.md"
+    },
     {
       "id": "agents-v2-py",
       "name": "agents-v2-py",