Add plugin structure, lazy load feature, and basic admin settings

admin/settings.php

@@ -0,0 +1,47 @@
+<?php
+/**
+ * Admin settings page
+ */
+
+// Add menu item
+function wpa_superstar_admin_menu() {
+    add_options_page(
+        'WPA Superstar Settings',
+        'WPA Superstar',
+        'manage_options',
+        'wpa-superstar',
+        'wpa_superstar_settings_page'
+    );
+}
+add_action( 'admin_menu', 'wpa_superstar_admin_menu' );
+
+// Register settings
+function wpa_superstar_register_settings() {
+    register_setting( 'wpa-superstar-settings', 'wpa_superstar_lazy_load' );
+}
+add_action( 'admin_init', 'wpa_superstar_register_settings' );
+
+// Settings page HTML
+function wpa_superstar_settings_page() {
+    ?>
+    <div class="wrap">
+        <h1><?php echo esc_html( get_admin_page_title() ); ?></h1>
+        <form method="post" action="options.php">
+            <?php settings_fields( 'wpa-superstar-settings' ); ?>
+            <?php do_settings_sections( 'wpa-superstar-settings' ); ?>
+            <table class="form-table">
+                <tr>
+                    <th scope="row">Lazy Load Images</th>
+                    <td>
+                        <label>
+                            <input type="checkbox" name="wpa_superstar_lazy_load" value="1" <?php checked( get_option( 'wpa_superstar_lazy_load', 1 ) ); ?> />
+                            Enable lazy loading for images
+                        </label>
+                    </td>
+                </tr>
+            </table>
+            <?php submit_button(); ?>
+        </form>
+    </div>
+    <?php
+}