feat: implement server self-upgrade functionality

- Added update service to fetch the latest server release from GitHub.
- Implemented server upgrade scheduling and execution logic.
- Created platform-specific restart mechanisms for Unix and Windows.
- Introduced API endpoints for fetching the latest release and triggering upgrades.
- Developed UI components for version upgrade modal, including loading and error states.
- Updated documentation to reflect new upgrade features and instructions.
- Refactored settings types to streamline interface definitions.

atsf_server/service/update_restart_unix.go

@@ -0,0 +1,27 @@
+//go:build !windows
+
+package service
+
+import (
+	"fmt"
+	"os"
+	"syscall"
+)
+
+func replaceAndRestartServer(execPath string, tmpPath string) error {
+	backupPath := execPath + ".bak"
+	_ = os.Remove(backupPath)
+	if err := os.Rename(execPath, backupPath); err != nil {
+		_ = os.Remove(tmpPath)
+		return fmt.Errorf("备份当前服务端二进制失败: %w", err)
+	}
+	if err := os.Rename(tmpPath, execPath); err != nil {
+		_ = os.Rename(backupPath, execPath)
+		return fmt.Errorf("替换服务端二进制失败: %w", err)
+	}
+	_ = os.Remove(backupPath)
+	if err := syscall.Exec(execPath, os.Args, os.Environ()); err != nil {
+		return fmt.Errorf("重启服务失败: %w", err)
+	}
+	return fmt.Errorf("unreachable after exec")
+}