feat(tci): the transmit meters, and no temperature invented

TX_POWER and TX_SWR are read-only commands the radio answers when asked,
so they are asked for on each poll of a KEYED radio and not at all
otherwise: a receiving station pays nothing for meters nobody is watching.
Both appear next to the S-meter only while transmitting, because showing
them the rest of the time would show the last thing that happened as if it
were now.

An SWR of 0 draws as '—' rather than as 1.0. A perfect match on an antenna
nobody has measured is the one reading an operator should never be handed.

There is no temperature. The protocol's command list has TX_POWER and
TX_SWR and nothing thermal at all — so rather than leave the question
hanging, it is written down where the next person will look for it. A
temperature invented from something else, on a transmitter, is exactly the
kind of number somebody would trust.

frontend/wailsjs/go/models.ts

@@ -1238,6 +1238,8 @@ export namespace cat {
 	    lock: boolean;
 	    split: boolean;
 	    smeter: number;
+	    tx_power_w: number;
+	    tx_swr: number;
 	    modulations?: string[];
 	
 	    static createFrom(source: any = {}) {
@@ -1273,6 +1275,8 @@ export namespace cat {
 	        this.lock = source["lock"];
 	        this.split = source["split"];
 	        this.smeter = source["smeter"];
+	        this.tx_power_w = source["tx_power_w"];
+	        this.tx_swr = source["tx_swr"];
 	        this.modulations = source["modulations"];
 	    }
 	}