Add new CSS, JS, and icon assets to rustfs-gui (#221)

* Add new CSS, JS, and icon assets to rustfs-gui

- Add `navbar.css` for styling the navigation bar.
- Add `sts.js` for handling tab switching and password toggling.
- Include new icon assets in `assets/icons` directory.
- Update `Dioxus.toml` to reference new assets.

* Remove unused icons from dioxus.toml

- Remove `assets/icons/icon_*.png` from the icon list.

cli/rustfs-gui/assets/js/sts.js

@@ -0,0 +1,32 @@
+window.switchTab = function (tabId) {
+    // Hide everything
+    document.querySelectorAll('.tab-content').forEach(content => {
+        content.classList.add('hidden');
+    });
+
+    // Reset all label styles
+    document.querySelectorAll('.tab-btn').forEach(btn => {
+        btn.classList.remove('border-b-2', 'border-black');
+        btn.classList.add('text-gray-500');
+    });
+
+    // Displays the selected content
+    const activeContent = document.getElementById(tabId);
+    if (activeContent) {
+        activeContent.classList.remove('hidden');
+    }
+
+    // Updates the selected label style
+    const activeBtn = document.querySelector(`[data-tab="${tabId}"]`);
+    if (activeBtn) {
+        activeBtn.classList.add('border-b-2', 'border-black');
+        activeBtn.classList.remove('text-gray-500');
+    }
+};
+
+window.togglePassword = function (button) {
+    const input = button.parentElement.querySelector('input[type="password"], input[type="text"]');
+    if (input) {
+        input.type = input.type === 'password' ? 'text' : 'password';
+    }
+};