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

SKALD.md

@@ -1,6 +1,10 @@
 # Skald Connectors Marketplace
 
-_Updated: 2026-07-21_
+## Reference locale
+
+- **[docs/connector.manifest_guide.md](docs/connector.manifest_guide.md)** — Guida ufficiale per generare connector corretti (copiata da `skald-circle/blueprint/`)
+
+_Updated: 2026-07-22_
 
 **Remote**: `https://git.skaldagent.net/dguiducci/skald-connectors.git`
 **Live**: `https://connectors.skaldagent.net/`
@@ -481,6 +485,7 @@ sudo find /var/www/connectors.skaldagent.net/ -type f -exec chmod 644 {} \;
 
 | ID | Nome | Tipo | Scope | Auth | Verify |
 |----|------|------|-------|------|--------|
+| `context7` | Context7 | `mcp_remote` | `global` | none | `verify.py` (MCP initialize probe) |
 | `exa` | Exa | `mcp_remote` | `global` | api_key (`{SECRET:exaApiKey}` in URL — optional, free tier) | `verify.py` (MCP initialize probe) |
 | `tavily` | Tavily | `mcp_remote` | `global` | api_key (`{SECRET:tavilyApiKey}` in URL) | `verify.py` (HTTP probe `/search`) |
 | `serpapi-flights` | SerpAPI Flights | `mcp_remote` | `global` | api_key (`{SECRET:serpapiApiKey}` in URL) | `verify.py` (MCP initialize probe) |