Add time/date access for Ikario and Tavily MCP specification

Major changes:
- Added current date/time to system prompt so Ikario always knows when it is
- Created comprehensive Tavily MCP integration spec (10 features)
- Updated .gitignore to exclude node_modules

Time Access Feature:
- Modified buildSystemPrompt in server/routes/messages.js
- Modified buildSystemPrompt in server/routes/claude.js
- Ikario now receives: date, time, ISO timestamp, timezone
- Added debug logging to verify system prompt

Tavily MCP Spec (app_spec_tavily_mcp.txt):
- Internet access via Tavily search API
- 10 detailed features with implementation steps
- Compatible with existing ikario-memory MCP
- Provides real-time web search and news search

🤖 Generated with Claude Code

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

.gitignore

@@ -6,4 +6,8 @@ logs/
 
 .env
 venv
-__pycache__
+__pycache__
+
+# Node modules (if any)
+node_modules/
+package-lock.json