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/wikipedia/connector.json

@@ -1,28 +1,39 @@
 {
   "id": "wikipedia",
   "name": "Wikipedia",
-  "version": "1.0.0",
   "type": "mcp_local",
   "launch_command": "python3 wikipedia_mcp_server.py",
   "transport": "stdio",
   "dependencies": [
     "httpx>=0.27.0"
   ],
-  "docs": [{
-    "lang": "en",
-    "description": "Search and read Wikipedia articles — free, no API key required. Search by keyword (returns titles, summaries, and URLs) or read the full text content of any Wikipedia article by title. Automatic redirect resolution and article truncation for long pages.",
-    "llm_short_description": "Wikipedia MCP: search articles and read full text. Free, no API key. Tools: search, readArticle."
-  }],
+  "docs": [
+    {
+      "lang": "en",
+      "description": "Search and read Wikipedia articles \u2014 free, no API key required. Search by keyword (returns titles, summaries, and URLs) or read the full text content of any Wikipedia article by title. Automatic redirect resolution and article truncation for long pages.",
+      "llm_short_description": "Wikipedia MCP: search articles and read full text. Free, no API key. Tools: search, readArticle."
+    }
+  ],
   "auth": {
     "type": "none"
   },
   "setup_instructions": [
     "Install dependencies: pip install -r requirements.txt",
-    "No configuration needed — Wikipedia API is free and public."
+    "No configuration needed \u2014 Wikipedia API is free and public."
   ],
   "homepage": "https://www.wikipedia.org",
   "icon_small": "icon_sm.svg",
   "icon_large": "icon_lg.svg",
   "scope": "global",
-  "tags": ["wikipedia", "mcp", "local", "free", "reference", "research"]
+  "tags": [
+    "wikipedia",
+    "mcp",
+    "local",
+    "free",
+    "reference",
+    "research"
+  ],
+  "version": 1,
+  "version_string": "1.0.0",
+  "version_release_date": "2026-07-19"
 }