Initial commit: RMM Agent + Backend

- Go Agent (FreeBSD/amd64) fuer OPNsense
- Go Backend (Linux/amd64) mit REST API + SQLite
- Collector: Hardware, CPU, Memory, Disks, Network, Services,
  WireGuard, DHCP (KEA/ISC/dnsmasq), Routes, Gateways,
  Certificates, Plugins, Updates
- Persistente Agent-ID
- TLS + API-Key Auth
- WebSocket-Infrastruktur (WIP): bidirektionaler Command-Kanal,
  TCP-Tunnel fuer Remote-Zugriff auf Firewall-WebUI
- Lastenheft und README

agent/config/config.go

@@ -0,0 +1,33 @@
+package config
+
+import (
+	"os"
+
+	"gopkg.in/yaml.v3"
+)
+
+type Config struct {
+	BackendURL      string `yaml:"backend_url"`
+	APIKey          string `yaml:"api_key"`
+	IntervalSeconds int    `yaml:"interval_seconds"`
+	AgentName       string `yaml:"agent_name"`
+	Insecure        bool   `yaml:"insecure"`
+}
+
+func Load(path string) (*Config, error) {
+	cfg := &Config{
+		IntervalSeconds: 60,
+		Insecure:        true,
+	}
+
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return nil, err
+	}
+
+	if err := yaml.Unmarshal(data, cfg); err != nil {
+		return nil, err
+	}
+
+	return cfg, nil
+}