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/context7/connector.json

@@ -0,0 +1,47 @@
+{
+  "id": "context7",
+  "name": "Context7",
+  "version": 1,
+  "version_string": "1.0.0",
+  "version_release_date": "2026-07-22",
+  "type": "mcp_remote",
+  "scope": "global",
+  "tags": [
+    "documentation",
+    "search",
+    "mcp",
+    "remote",
+    "developer-tools"
+  ],
+  "auth": {
+    "type": "none"
+  },
+  "docs": [
+    {
+      "lang": "en",
+      "description": "Up-to-date documentation and code examples for any library, framework, SDK, API, CLI tool, or cloud service — fetched directly from the source. Works without an API key on the free tier. Supports library lookup and version-specific documentation retrieval.",
+      "llm_short_description": "Fetch up-to-date documentation and code examples for libraries and frameworks. Tools: resolve-library-id (look up a library by name), query-docs (retrieve docs for a known library ID)."
+    }
+  ],
+  "mcp_config": {
+    "url": "https://mcp.context7.com/mcp",
+    "transport": "streamable-http"
+  },
+  "verify": {
+    "command": "python3 verify.py",
+    "timeout_secs": 15
+  },
+  "homepage": "https://context7.com",
+  "icon_small": "icon_sm.svg",
+  "icon_large": "icon_lg.svg",
+  "tools": [
+    {
+      "name": "resolve-library-id",
+      "display_name": "Resolve Library"
+    },
+    {
+      "name": "query-docs",
+      "display_name": "Query Docs"
+    }
+  ]
+}