feat: add backup alert functionality

This commit adds a new function `fn_alert_backup` to the `alert.sh` module. This function sends an alert when the system has been backed up. The alert includes a message, action, emoji, sound, and color.

In addition, this commit modifies the `command_backup.sh` module to trigger the backup alert by setting the variable `alert` to "backup" and calling `alert.sh`.

The purpose of these changes is to provide notifications when backups are created.

Co-authored-by: AI Assistant <assistant@example.com>

lgsm/modules/alert.sh

@@ -130,6 +130,17 @@ fn_alert_update_linuxgsm() {
 	alertcolourdec="52480"
 }
 
+fn_alert_backup() {
+	fn_script_log_info "Sending alert: ${selfname} has been backed up"
+	alertaction="Backed Up"
+	alertemoji="📂"
+	alertsound="1"
+	alertmessage="${selfname} has been backed up."
+	# Green
+	alertcolourhex="#00cd00"
+	alertcolourdec="52480"
+}
+
 fn_alert_permissions() {
 	fn_script_log_info "Sending alert: ${selfname} has permissions issues"
 	alertaction="Checked Permissions"
@@ -204,6 +215,8 @@ elif [ "${alert}" == "restarted" ]; then
 	fn_alert_restarted
 elif [ "${alert}" == "update-linuxgsm" ]; then
 	fn_alert_update_linuxgsm
+elif [ "${alert}" == "backup" ]; then
+	fn_alert_backup
 else
 	fn_print_fail_nl "Missing alert type"
 	fn_script_log_fatal "Missing alert type"

lgsm/modules/command_backup.sh

@@ -138,6 +138,8 @@ fn_backup_compression() {
 		fn_print_ok_eol
 		fn_print_ok_nl "Completed: ${backupname}.tar.gz, total size $(du -sh "${backupdir}/${backupname}.tar.gz" | awk '{print $1}')"
 		fn_script_log_pass "Backup created: ${backupname}.tar.gz, total size $(du -sh "${backupdir}/${backupname}.tar.gz" | awk '{print $1}')"
+		alert="backup"
+		alert.sh
 	fi
 }