build: use version to setup build reproducibility (#595)

# Motivation

We can use the version to setup build reproducibility and save few
cycles when deploying to `gix.design`.

# Changes

- Setup version as we do in OISY or NNS Dapp or Juno

---------

Co-authored-by: github-actions <41898282+github-actions[bot]@users.noreply.github.com>

Author: peterpeterparker

svelte.config.js

@@ -1,6 +1,12 @@
 import adapter from "@sveltejs/adapter-static";
 import { vitePreprocess } from "@sveltejs/vite-plugin-svelte";
 import { mdsvex } from "mdsvex";
+import { readFileSync } from "node:fs";
+import { fileURLToPath } from "node:url";
+
+const file = fileURLToPath(new URL("package.json", import.meta.url));
+const json = readFileSync(file, "utf8");
+const { version } = JSON.parse(json);
 
 /** @type {import('@sveltejs/kit').Config} */
 const config = {
@@ -21,6 +27,9 @@ const config = {
     serviceWorker: {
       register: false,
     },
+    version: {
+      name: version,
+    },
   },
 };