fix: trim patterns response tokens and add missing documentation (#683)

- Trim task-specific patterns ~64%: drop displayName, shorten field names
  (frequency→freq), cap chains at 5, use short node type names in chains
- Add patterns mode to tools_documentation essentials, full docs, and
  tools-documentation.ts overview (was completely missing)
- Document includeOperations omission behavior for trigger/freeform nodes
- Add patterns return shape to search_templates returns documentation
- Trim search_nodes examples from 11 to 6

Conceived by Romuald Członkowski - https://www.aiadvisors.pl/en

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

package.json

@@ -1,6 +1,6 @@
 {
   "name": "n8n-mcp",
-  "version": "2.42.2",
+  "version": "2.42.3",
   "description": "Integration between n8n workflow automation and Model Context Protocol (MCP)",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",