feat: Dynamic MeshMonitor trigger sync — auto-ignore MeshMonitor commands

Add MeshMonitorSync class that reads trigger patterns from a JSON file
and compiles them to regex. The router checks incoming messages against
these patterns and ignores messages that MeshMonitor will handle.

- New meshai/meshmonitor.py: Pattern compilation and file watching
- MeshMonitorConfig dataclass with enabled, triggers_file, inject_into_prompt
- Router integration: ignore matching messages, inject commands into prompt
- Main loop refresh: watch triggers file for changes without restart

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

meshai/config.py

@@ -75,6 +75,16 @@ class ContextConfig:
     max_context_items: int = 20  # Max observations injected into LLM context
 
 
+
+
+@dataclass
+class MeshMonitorConfig:
+    """MeshMonitor trigger sync settings."""
+
+    enabled: bool = False
+    triggers_file: str = ""
+    inject_into_prompt: bool = True
+
 @dataclass
 class CommandsConfig:
     """Command settings."""
@@ -146,6 +156,7 @@ class Config:
     commands: CommandsConfig = field(default_factory=CommandsConfig)
     llm: LLMConfig = field(default_factory=LLMConfig)
     weather: WeatherConfig = field(default_factory=WeatherConfig)
+    meshmonitor: MeshMonitorConfig = field(default_factory=MeshMonitorConfig)
 
     _config_path: Optional[Path] = field(default=None, repr=False)