Add versioning schema: version (int), version_string, version_release_date to all 10 connectors

- version: intero per-connector (parte da 1)
- version_string: semver ereditato (display only)
- version_release_date: ISO 8601 (display only)
- Campi identici in index (connectors.json) e manifest (connector.json)
- Aggiunto connector.json alle files[] di gmail, gcal, email, ssh, tavily
- Aggiornata documentazione in SKALD.md

connectors/weather/connector.json

@@ -1,28 +1,39 @@
 {
   "id": "weather",
   "name": "Weather (Open-Meteo)",
-  "version": "1.0.0",
   "type": "mcp_local",
   "launch_command": "python3 weather_mcp_server.py",
   "transport": "stdio",
   "dependencies": [
     "httpx>=0.27.0"
   ],
-  "docs": [{
-    "lang": "en",
-    "description": "Global weather, forecast, and air quality via Open-Meteo — free, no API key required. Get current conditions (temperature, humidity, wind, UV, visibility), multi-day forecasts (min/max temps, rain probability, sunrise/sunset), and air quality (European & US AQI, PM2.5, PM10, NO\u2082, O\u2083, CO, SO\u2082, NH\u2083) for any city worldwide.",
-    "llm_short_description": "Weather & air quality MCP: current conditions, 16-day forecast, AQI, pollutants. Free, no API key."
-  }],
+  "docs": [
+    {
+      "lang": "en",
+      "description": "Global weather, forecast, and air quality via Open-Meteo \u2014 free, no API key required. Get current conditions (temperature, humidity, wind, UV, visibility), multi-day forecasts (min/max temps, rain probability, sunrise/sunset), and air quality (European & US AQI, PM2.5, PM10, NO\u2082, O\u2083, CO, SO\u2082, NH\u2083) for any city worldwide.",
+      "llm_short_description": "Weather & air quality MCP: current conditions, 16-day forecast, AQI, pollutants. Free, no API key."
+    }
+  ],
   "auth": {
     "type": "none"
   },
   "setup_instructions": [
     "Install dependencies: pip install -r requirements.txt",
-    "No configuration needed — Open-Meteo is a free public API with no API key."
+    "No configuration needed \u2014 Open-Meteo is a free public API with no API key."
   ],
   "homepage": "https://open-meteo.com",
   "icon_small": "icon_sm.svg",
   "icon_large": "icon_lg.svg",
   "scope": "global",
-  "tags": ["weather", "mcp", "local", "free", "forecast", "air-quality"]
+  "tags": [
+    "weather",
+    "mcp",
+    "local",
+    "free",
+    "forecast",
+    "air-quality"
+  ],
+  "version": 1,
+  "version_string": "1.0.0",
+  "version_release_date": "2026-07-19"
 }