fix(deploy): migrate deployment scripts and docs from tmux to herdr

deploy/install.sh

@@ -28,7 +28,7 @@ check_cmd() {
   fi
 }
 
-check_cmd tmux
+check_cmd herdr
 check_cmd python3
 
 # Verify Python Version
@@ -246,7 +246,7 @@ MQTT_BROKER=broker.hivemq.com
 MQTT_PORT=1883
 MQTT_TLS=0
 MQTT_CLIENT_ID_PREFIX=mam-agent
-TMUX_SERVER_NAME=default
+HERDR_SERVER_NAME=default
 EOF
   chmod 0600 "$ENV_FILE"
   echo "✅ Config file .env initialized with chmod 0600."