Make PACMANs a little better (#24604)

* PACMAN generators show network load/supply.

This gives more feedback to players that their PACMAN is properly connected and what the network status is (i.e. you don't have enough generators).

* Buff JRPACMAN to 8 kW.

Shifted all power values up by +3 kW.

They're frequently too weak to power even single rooms so they deserve a buff.

* Change unit format helpers number format.

Always displays one digit of precision. This avoids jumping around when a value is changing live.

Content.Server/Power/NodeGroups/IBasePowerNet.cs

@@ -5,6 +5,16 @@ namespace Content.Server.Power.NodeGroups
 {
     public interface IBasePowerNet
     {
+        /// <summary>
+        /// Indicates whether this network forms some form of connection (more than one node).
+        /// </summary>
+        /// <remarks>
+        /// Even "unconnected" power devices form a single-node power network all by themselves.
+        /// To players, this doesn't look like they're connected to anything.
+        /// This property accounts for this and forms a more intuitive check.
+        /// </remarks>
+        bool IsConnectedNetwork { get; }
+
         void AddConsumer(PowerConsumerComponent consumer);
 
         void RemoveConsumer(PowerConsumerComponent consumer);