Refactor process management and improve shutdown logic

Removed excessive logging and streamlined process restart and shutdown flows in napcat.ts. Added isShuttingDown flag to prevent unintended worker restarts during shutdown. Improved forceKillProcess to handle Windows-specific process termination. Updated IWorkerProcess interface and implementations to include the 'off' event method for better event management.

packages/napcat-shell/process-api.ts

@@ -25,6 +25,7 @@ export interface IWorkerProcess {
   kill (): boolean;
   on (event: string, listener: (...args: unknown[]) => void): void;
   once (event: string, listener: (...args: unknown[]) => void): void;
+  off (event: string, listener: (...args: unknown[]) => void): void;
 }
 
 /**
@@ -79,6 +80,10 @@ class ElectronProcessManager implements IProcessManager {
       once (event: string, listener: (...args: unknown[]) => void): void {
         child.once(event, listener);
       },
+
+      off (event: string, listener: (...args: unknown[]) => void): void {
+        child.off(event, listener);
+      },
     };
   }
 
@@ -134,6 +139,10 @@ class NodeProcessManager implements IProcessManager {
       once (event: string, listener: (...args: unknown[]) => void): void {
         child.once(event, listener);
       },
+
+      off (event: string, listener: (...args: unknown[]) => void): void {
+        child.off(event, listener);
+      },
     };
   }