Add --type option for services across all 42 implementations

Support service_type for SRV records (minecraft, mumble, teamspeak, source, tcp, udp).
Each implementation now parses --type and sends service_type in the JSON payload.

un.tcl

@@ -361,6 +361,7 @@ proc cmd_service {args} {
     set destroy_id ""
     set name ""
     set ports ""
+    set service_type ""
     set bootstrap ""
     set network ""
     set vcpu 0
@@ -400,6 +401,10 @@ proc cmd_service {args} {
                 incr i
                 set ports [lindex $args $i]
             }
+            --type {
+                incr i
+                set service_type [lindex $args $i]
+            }
             --bootstrap {
                 incr i
                 set bootstrap [lindex $args $i]
@@ -479,6 +484,10 @@ proc cmd_service {args} {
             lappend payload ports [::json::write array {*}$port_json]
         }
 
+        if {$service_type ne ""} {
+            lappend payload service_type [::json::write string $service_type]
+        }
+
         if {$bootstrap ne ""} {
             # Check if bootstrap is a file
             if {[file exists $bootstrap]} {