Refactor openlocation feature

internal/openfolder/open_windows.go

@@ -0,0 +1,14 @@
+//go:build windows
+
+package openfolder
+
+import (
+	"os/exec"
+	"strings"
+)
+
+func OpenLocation(path string) error {
+	// explorer requires backslashes.
+	p := strings.ReplaceAll(path, "/", "\\")
+	return exec.Command("explorer.exe", p).Start()
+}