feat: Add GeoAutoUpdate and GeoUpdateInterval to config

[Kuingsmile]

1. Introduction of geo-auto-update and geo-update-interval Configuration Items

geo-auto-update : This flag controls the automatic updating of the geo data file. It is set to false by default, ensuring that auto-updates are opt-in rather than automatic.

geo-update-interval : This parameter defines the interval (in hours) for the geo data file auto-update process. The default value is set to 24 hours, providing a daily update cycle when geo-auto-update is enabled.

2. Bug Fix: Accurate Error Handling in saveFile Function

The original code did not correctly capture and relay errors encountered during the file saving process.

Previous Implementation:

data, err := downloadForBytes(ExternalUIURL)
if err != nil {
	return fmt.Errorf("can't download  file: %w", err)
}

saved := path.Join(C.Path.HomeDir(), "download.zip")
// this place
if saveFile(data, saved) != nil {
	return fmt.Errorf("can't save zip file: %w", err)
}
defer os.Remove(saved)

Revised Implementation:

data, err := downloadForBytes(ExternalUIURL)
if err != nil {
	return fmt.Errorf("can't download  file: %w", err)
}

saved := path.Join(C.Path.HomeDir(), "download.zip")
// fixed
if err = saveFile(data, saved); err != nil {
	return fmt.Errorf("can't save zip file: %w", err)
}
defer os.Remove(saved)

[Larvan2]

thanks for PR