feat(system): add system status and software info endpoints

Add new endpoints to expose system status and software information:
- /system/getStatus returns current system status (online/offline)
- /system/getSoftwareInfo returns software version and build details
Update API documentation to include new endpoints

router.go

@@ -8,6 +8,9 @@ import (
 
 func setupRoutes() {
 	postLog.Info("Setting up routes...")
+	http.HandleFunc("/system/getStatus", GetStatusHandler)
+	http.HandleFunc("/system/getSoftwareInfo", GetSoftwareInfoHandler)
+
 	http.HandleFunc("/register", RegisterHandler)
 	http.HandleFunc("/login", LoginHandler)
 	http.HandleFunc("/logout", LogoutHandler)