feat: publish Alta Local Camera Discovery

preload.js

@@ -0,0 +1,9 @@
+'use strict';
+
+const { contextBridge, ipcRenderer } = require('electron');
+
+contextBridge.exposeInMainWorld('altaDiscovery', Object.freeze({
+  scan: () => ipcRenderer.invoke('scan-cameras'),
+  copyText: (text) => ipcRenderer.invoke('copy-text', text),
+  exportCsv: () => ipcRenderer.invoke('export-csv'),
+}));