Aggiunto connector Context7 (mcp_remote)

- URL: https://mcp.context7.com/mcp, trasporto streamable-http
- Auth: none (endpoint pubblico, free tier)
- Verify: MCP initialize probe (testato ✅)
- Icone SVG dal logo ufficiale Context7

Inoltre:
- Copiata docs/connector.manifest_guide.md da skald-circle/blueprint/
- Riferimento alla guida in SKALD.md

connectors/connectors.json

@@ -838,6 +838,61 @@
           "size": 285
         }
       ]
+    },
+    {
+      "id": "context7",
+      "name": "Context7",
+      "type": "mcp_remote",
+      "scope": "global",
+      "icon_small": "context7/icon_sm.svg",
+      "icon_large": "context7/icon_lg.svg",
+      "user_description": "Up-to-date documentation and code examples for any library, framework, SDK, API, CLI tool, or cloud service \u2014 fetched directly from the source. Free, no API key required.",
+      "tags": [
+        "documentation",
+        "search",
+        "mcp",
+        "remote",
+        "developer-tools"
+      ],
+      "auth": {
+        "type": "none"
+      },
+      "folder": "context7",
+      "version": 1,
+      "version_string": "1.0.0",
+      "version_release_date": "2026-07-22",
+      "files": [
+        {
+          "path": "connector.json",
+          "sha256": "c7dfedad4e017c88420a78420f2ea2de35fc80d921b5da6bf628f8eceaf93584",
+          "size": 1321
+        },
+        {
+          "path": "verify.py",
+          "sha256": "8e46d562c028c4f5370c22c7df455886836267cf4bbb8ac605c79a2b509fb5f1",
+          "size": 2094
+        },
+        {
+          "path": "icon_sm.svg",
+          "sha256": "5407c6bf958a7d1c83a76440c8bb8e6508941cae9f9f319dfbb9c9250807f5e0",
+          "size": 724
+        },
+        {
+          "path": "icon_lg.svg",
+          "sha256": "1f9b3ec611c448eff1c4fb1844a948770f4c4aadf6b7e7a73d07fec738afe209",
+          "size": 739
+        }
+      ],
+      "tools": [
+        {
+          "name": "resolve-library-id",
+          "display_name": "Resolve Library"
+        },
+        {
+          "name": "query-docs",
+          "display_name": "Query Docs"
+        }
+      ]
     }
   ]
 }