Implement partial download

src/App.svelte

@@ -1,6 +1,25 @@
 <script lang="ts">
-  import svelteLogo from './assets/svelte.svg'
-  import Counter from './lib/Counter.svelte'
+  import { invoke } from '@tauri-apps/api/tauri';
+  import svelteLogo from './assets/svelte.svg';
+  import Counter from './lib/Counter.svelte';
+
+  let version: string = '';
+  const getJavaVersion = () => {
+    invoke('java_version')
+      .then((message: string) => {
+        version = message;
+      });
+  };
+
+  const downloadRevancedCli = () => {
+    invoke('download_revanced_cli')
+      .then((success: string) => {
+        version = success;
+      })
+      .catch((error: string) => {
+        version = error;
+      });
+  };
 </script>
 
 <main>
@@ -16,6 +35,9 @@
 
   <div class="card">
     <Counter />
+    <button on:click={getJavaVersion}>Get java version</button>
+    <button on:click={downloadRevancedCli}>Download revanced</button>
+    <p>{version}</p>
   </div>
 
   <p>