Initial commit: TaskPool React panel

- React frontend with route-level code splitting
- Backend rebranded from Baihu to TaskPool
- DB brand migration script and local compatibility

internal/executor/proc_windows.go

@@ -0,0 +1,18 @@
+//go:build windows
+
+package executor
+
+import (
+	"fmt"
+	"os/exec"
+)
+
+func SetProcessGroupAndCancel(cmd *exec.Cmd, usePty bool) {
+	cmd.Cancel = func() error {
+		if cmd.Process != nil {
+			killCmd := exec.Command("taskkill", "/F", "/T", "/PID", fmt.Sprintf("%d", cmd.Process.Pid))
+			return killCmd.Run()
+		}
+		return nil
+	}
+}