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/gcal/connector.json

@@ -1,13 +1,20 @@
 {
   "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"],
+  "requires": [
+    "OAUTH",
+    "PYTHON"
+  ],
+  "tags": [
+    "calendar",
+    "mcp",
+    "local",
+    "google"
+  ],
   "dependencies": [
     "google-api-python-client>=2.150.0",
     "google-auth>=2.35.0"
@@ -19,7 +26,7 @@
     {
       "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."
+      "llm_short_description": "Google Calendar MCP connector \u2014 full CRUD + RSVP + push polling."
     }
   ],
   "auth": {
@@ -36,7 +43,9 @@
   },
   "mcp_config": {
     "command": "python3",
-    "args": ["gcal_mcp_server.py"]
+    "args": [
+      "gcal_mcp_server.py"
+    ]
   },
   "verify": {
     "command": "python3 verify.py",
@@ -44,5 +53,8 @@
   },
   "homepage": "https://calendar.google.com",
   "icon_small": "icon_sm.svg",
-  "icon_large": "icon_lg.svg"
+  "icon_large": "icon_lg.svg",
+  "version": 1,
+  "version_string": "0.3.0",
+  "version_release_date": "2026-07-19"
 }