move pvws message interface out into new file

app/components/IfcPVWSMessage.tsx

@@ -0,0 +1,20 @@
+export interface PVWSMessage {
+  type: string;
+  pv: string;
+  value?: number | null;
+  text?: string | null;
+  b64byt?: string | null;
+  units?: string | null;
+  precision?: number | null;
+  labels?: string | null;
+  min?: number | null;
+  max?: number | null;
+  warn_low?: number | null;
+  warn_high?: number | null;
+  alarm_low?: number | null;
+  alarm_high?: number | null;
+  severity?: string | null;
+  seconds?: number | null;
+  readonly?: boolean | null;
+  nanos?: number | null;
+}

app/components/InstrumentData.tsx

@@ -7,30 +7,10 @@ import useWebSocket from "react-use-websocket";
 import { dehex_and_decompress } from "./dehex_and_decompress";
 import { Instrument } from "./Instrument";
 import {PV} from "./PV";
+import { PVWSMessage } from "./IfcPVWSMessage";
 
 let lastUpdate: string = "";
 
-interface PVWSMessage {
-  type: string;
-  pv: string;
-  value?: number|null;
-  text?: string|null;
-  b64byt?: string|null;
-  units?: string|null;
-  precision?: number|null;
-  labels?: string|null;
-  min?: number|null;
-  max?: number|null;
-  warn_low?: number|null;
-  warn_high?: number|null;
-  alarm_low?: number|null;
-  alarm_high?: number|null;
-  severity?: string|null;
-  seconds?: number|null;
-  readonly?: boolean|null;
-  nanos?: number|null;
-}
-
 export default function InstrumentData({instrumentName}: {instrumentName:string} ) {
   // set up the different states for the instrument data