refactor(system tasks): 格式化代码并新增重启资源管理器任务

将原有的单行TaskSpec调用拆分为多行格式化写法，同时补充restart_explorer任务到任务列表中

src/pyflowx/tasks/system.py

@@ -26,20 +26,28 @@ def reset_icon_cache() -> list[px.TaskSpec]:
         return []
 
     return [
-        px.TaskSpec("kill_explorer", fn=lambda: subprocess.run(["taskkill", "/f", "/im", "explorer.exe"], check=False), verbose=True),
+        px.TaskSpec(
+            "kill_explorer",
+            fn=lambda: subprocess.run(["taskkill", "/f", "/im", "explorer.exe"], check=False),
+            verbose=True,
+        ),
         px.TaskSpec(
             "delete_icon_cache",
             fn=lambda: subprocess.run(["del", "/a", "/q", r"%localappdata%\IconCache.db"], check=False),
-            verbose=True
+            verbose=True,
         ),
         px.TaskSpec(
             "delete_icon_cache_all",
             fn=lambda: subprocess.run(
                 ["del", "/a", "/q", r"%localappdata%\Microsoft\Windows\Explorer\iconcache*"], check=False
             ),
-            verbose=True
+            verbose=True,
+        ),
+        px.TaskSpec(
+            "restart_explorer",
+            fn=lambda: subprocess.run(["cmd", "/c", "start", "explorer.exe"], check=False),
+            verbose=True,
         ),
-        px.TaskSpec("restart_explorer", fn=lambda: subprocess.run(["cmd", "/c", "start", "explorer.exe"], check=False), verbose=True),
     ]