fix(skills): fix --libs identifier format and rebuild claude-code-docs

- neuledge-context v1.2: document that --libs identifiers must include
  version suffix verbatim from `context list` (e.g. name@latest);
  add rebuild workflow for packages with bad crawl/low section count;
  add failure cases for get_docs returning Package not found and
  /reload-plugins not restarting stdio MCP processes
- .mcp.json: fix all --libs identifiers to include @latest suffix;
  update claude-code-docs to @2.1.98 (rebuilt from GitHub, 636 sections
  vs 9 from the previous bad web crawl)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TP4EGbBg3XMcyF28Lx78XJ

.mcp.json

@@ -6,13 +6,13 @@
       "args": [
         "serve",
         "--libs",
-        "claude-code-docs",
-        "mcp-docs",
-        "agent-skills-standard",
-        "github-copilot-docs",
-        "openai-agents-sdk"
+        "claude-code-docs@2.1.98",
+        "mcp-docs@latest",
+        "agent-skills-standard@latest",
+        "github-copilot-docs@latest",
+        "openai-agents-sdk@latest"
       ],
       "env": {}
     }
   }
-}
+}