Add Google Calendar connector (gcal)

- connector.json: OAuth Google, scope https://www.googleapis.com/auth/calendar
  deliver: file/google_authorized_user → {secrets}/google_creds.json
  mcp_config.env.GOOGLE_CREDS_PATH = {secrets}/google_creds.json
- verify.py: loads creds + API probe (calendarList.list)
- gcal_mcp_server.py: 8 tools (status, list_calendars, list_events,
  get_event, create_event, update_event, delete_event, respond_to_event)
  + push notification polling
- icons: calendar SVG (48px + 96px)
- connectors.json index: gcal entry with auth + sha256
- SKALD.md: tabella connector + stato verify aggiornati

connectors/gcal/connector.json

@@ -0,0 +1,55 @@
+{
+  "id": "gcal",
+  "name": "Google Calendar",
+  "version": "0.3.0",
+  "type": "mcp_local",
+  "scope": "user",
+  "launch_command": "python3 gcal_mcp_server.py",
+  "transport": "stdio",
+  "requires": ["OAUTH", "PYTHON"],
+  "tags": ["calendar", "mcp", "local", "google"],
+  "dependencies": [
+    "google-api-python-client>=2.150.0",
+    "google-auth>=2.35.0",
+    "google-auth-oauthlib>=1.2.0"
+  ],
+  "setup_instructions": [
+    "Install dependencies: pip install -r requirements.txt",
+    "Create secrets/google_oauth_client.json with {\"client_id\": \"...\", \"client_secret\": \"...\"}",
+    "Run: python3 gcal_oauth_setup.py (opens browser for OAuth)",
+    "Set GOOGLE_CREDS_PATH env var or place token at secrets/google_creds.json"
+  ],
+  "docs": [
+    {
+      "lang": "en",
+      "description": "Read, create, update, delete, and respond to Google Calendar events. Supports push notifications for new events created by others.",
+      "llm_short_description": "Google Calendar MCP connector — full CRUD + RSVP + push polling."
+    }
+  ],
+  "auth": {
+    "type": "oauth2",
+    "provider": "google",
+    "scopes": [
+      "https://www.googleapis.com/auth/calendar"
+    ],
+    "deliver": {
+      "as": "file",
+      "format": "google_authorized_user",
+      "path": "{secrets}/google_creds.json"
+    }
+  },
+  "mcp_config": {
+    "command": "python3",
+    "args": ["gcal_mcp_server.py"],
+    "env": {
+      "GOOGLE_CREDS_PATH": "{secrets}/google_creds.json"
+    }
+  },
+  "verify": {
+    "command": "python3 verify.py",
+    "timeout_secs": 20
+  },
+  "homepage": "https://calendar.google.com",
+  "icon_small": "icon_sm.svg",
+  "icon_large": "icon_lg.svg"
+}