Add Hashgraph Online skill manifest schema catalog entry (#5409)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: kantorcodes

src/api/json/catalog.json

@@ -2,6 +2,16 @@
   "$schema": "https://json.schemastore.org/schema-catalog.json",
   "version": 1,
   "schemas": [
+    {
+      "name": "Hashgraph Online Skill Manifest",
+      "description": "Manifest for Hashgraph Online Registry Broker skill packages",
+      "fileMatch": [
+        "**/.hol/skill.json",
+        "**/hol/skill.json",
+        "hol-skill.json"
+      ],
+      "url": "https://raw.githubusercontent.com/hashgraph-online/skill-publish/main/schemas/skill.schema.json"
+    },
     {
       "name": "release-hub.json",
       "description": "Configuration file for Release Hub",