Add: Vite Electron Builder template

From https://github.com/cawa-93/vite-electron-builder

webapp/types/vite-env.d.ts

@@ -0,0 +1,15 @@
+/// <reference types="vite/client" />
+
+/**
+ * Describes all existing environment variables and their types.
+ * Assists in autocomplete and typechecking
+ *
+ * @see https://github.com/vitejs/vite/blob/eef51cb37db98a1ad9a541bdd3cd74736ff8488d/packages/vite/types/importMeta.d.ts#L62-L69 Base Interface
+ */
+interface ImportMetaEnv {
+
+  /**
+   * The value of the variable is set in scripts/watch.js and depend on packages/main/vite.config.js
+   */
+  VITE_DEV_SERVER_URL: undefined | string;
+}