feat(about): add app info and github release update checker

vite.config.ts

@@ -1,12 +1,18 @@
 import { quasar, transformAssetUrls } from '@quasar/vite-plugin';
 import vue from '@vitejs/plugin-vue';
+import { readFileSync } from 'node:fs';
 import { fileURLToPath } from 'node:url';
 import { defineConfig } from 'vite';
 import checker from 'vite-plugin-checker';
 import NodeCGPlugin from 'vite-plugin-nodecg';
 
+const packageJson = JSON.parse(readFileSync(new URL('./package.json', import.meta.url), 'utf-8')) as { version: string };
+
 // https://vitejs.dev/config/
 export default defineConfig({
+  define: {
+    'import.meta.env.PACKAGE_VERSION': JSON.stringify(packageJson.version),
+  },
   plugins: [
     vue({ template: { transformAssetUrls } }),
     quasar({