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Deleted files (superseded by newer systems):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- heartbeat.py (superseded by scheduled_tasks.py)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>

examples/example_bot_usage.py

@@ -0,0 +1,75 @@
+"""
+Example: Using the adapter system programmatically.
+
+Demonstrates how to integrate adapters into your own code,
+rather than using the bot_runner.py CLI.
+"""
+
+import asyncio
+
+from adapters.base import AdapterConfig
+from adapters.runtime import (
+    AdapterRuntime,
+    command_preprocessor,
+    markdown_postprocessor,
+)
+from adapters.slack.adapter import SlackAdapter
+from adapters.telegram.adapter import TelegramAdapter
+from agent import Agent
+
+
+async def main() -> None:
+    # 1. Create the agent
+    agent = Agent(
+        provider="claude",
+        workspace_dir="./memory_workspace",
+        enable_heartbeat=False,
+    )
+
+    # 2. Create runtime
+    runtime = AdapterRuntime(agent)
+
+    # 3. Add preprocessors and postprocessors
+    runtime.add_preprocessor(command_preprocessor)
+    runtime.add_postprocessor(markdown_postprocessor)
+
+    # 4. Configure Slack adapter
+    slack_adapter = SlackAdapter(AdapterConfig(
+        platform="slack",
+        enabled=True,
+        credentials={
+            "bot_token": "xoxb-YOUR-TOKEN",
+            "app_token": "xapp-YOUR-TOKEN",
+        },
+    ))
+    runtime.add_adapter(slack_adapter)
+
+    # 5. Configure Telegram adapter
+    telegram_adapter = TelegramAdapter(AdapterConfig(
+        platform="telegram",
+        enabled=True,
+        credentials={"bot_token": "YOUR-TELEGRAM-TOKEN"},
+        settings={"parse_mode": "Markdown"},
+    ))
+    runtime.add_adapter(telegram_adapter)
+
+    # 6. Map users (optional)
+    runtime.map_user("slack:U12345", "alice")
+    runtime.map_user("telegram:123456789", "alice")
+
+    # 7. Start runtime
+    await runtime.start()
+
+    # 8. Keep running
+    try:
+        print("Bot is running! Press Ctrl+C to stop.")
+        while True:
+            await asyncio.sleep(1)
+    except KeyboardInterrupt:
+        print("\nStopping...")
+    finally:
+        await runtime.stop()
+
+
+if __name__ == "__main__":
+    asyncio.run(main())