refactor and add modules directory

widget/modules/Storage.tsx

@@ -0,0 +1,33 @@
+import { Variable } from "astal";
+import GTop from 'gi://GTop';
+
+const computeStorage = (): string => {
+    try {
+        const currentFsUsage = new GTop.glibtop_fsusage();
+
+        GTop.glibtop_get_fsusage(currentFsUsage, '/');
+
+        const total = currentFsUsage.blocks * currentFsUsage.block_size;
+        const available = currentFsUsage.bavail * currentFsUsage.block_size;
+        const used = total - available;
+
+        const storagestring = "    " + Math.floor(used / total * 100) + "%"
+
+        return storagestring
+    } catch (error) {
+        console.error('Error calculating RAM usage:', error);
+        return "";
+    }
+};
+
+export default function Storage() {
+    const storage_usage = Variable<string>("").poll(5000, () =>
+        computeStorage())
+
+    return <box className="storage">
+        <label 
+            className="Storage"
+            onDestroy={() => storage_usage.drop()}
+            label={storage_usage()} />
+    </box>
+}