Refactor: Clean up obsolete files and organize codebase structure

This commit removes deprecated modules and reorganizes code into logical directories:

Deleted files (superseded by newer systems):
- claude_code_server.py (replaced by agent-sdk direct integration)
- heartbeat.py (superseded by scheduled_tasks.py)
- pulse_brain.py (unused in production)
- config/pulse_brain_config.py (obsolete config)

Created directory structure:
- examples/ (7 example files: example_*.py, demo_*.py)
- tests/ (5 test files: test_*.py)

Updated imports:
- agent.py: Removed heartbeat module and all enable_heartbeat logic
- bot_runner.py: Removed heartbeat parameter from Agent initialization
- llm_interface.py: Updated deprecated claude_code_server message

Preserved essential files:
- hooks.py (for future use)
- adapters/skill_integration.py (for future use)
- All Google integration tools (Gmail, Calendar, Contacts)
- GLM provider code (backward compatibility)

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

config/scheduled_tasks.yaml

@@ -5,7 +5,16 @@ tasks:
   # Morning briefing - sent to Slack/Telegram
   - name: morning-weather
     prompt: |
-      Current weather report for my location. Just the weather - keep it brief.
+      Check the user profile (Jordan.md) for the location (Centennial, CO). Use the get_weather tool with OpenWeatherMap API to fetch the current weather. Format the report as:
+      
+      🌤️ **Weather Report for Centennial, CO**
+      - Current: [current]°F
+      - High: [high]°F
+      - Low: [low]°F
+      - Conditions: [conditions]
+      - Recommendation: [brief clothing/activity suggestion]
+      
+      Keep it brief and friendly!
     schedule: "daily 06:00"
     enabled: true
     send_to_platform: "telegram"