feat: caching, optimization, legal pages & footer

- WP Super Cache enabled (PHP mode, gzip, Nginx compatible)
- Autoptimize: CSS/HTML minification + deferred JS + Google Fonts optimization
- Cookie Notice: GDPR/LOPD banner styled with brand colors (navy/burgundy/gold)
- Legal pages: Aviso Legal, Política de Privacidad, Política de Cookies (ES)
- MU-plugin: custom footer with legal links + Cloud Host credit
- Footer: copyright, legal nav, Hosted & Maintained by Cloud Host (cloudhost.es)
- Security: X-Frame-Options, X-Content-Type, Referrer-Policy headers
- Security: XML-RPC disabled, REST user enumeration blocked
- Performance: emoji scripts removed, post revisions limited to 3

wp-content/plugins/wp-super-cache/inc/delete-cache-button.js

@@ -0,0 +1,37 @@
+/* global wpsc_ajax */
+( function ( $ ) {
+	$( document ).ready( function () {
+		$( '#wp-admin-bar-delete-cache' ).on( 'click', function () {
+			$( '#wp-admin-bar-delete-cache' ).fadeOut( 'slow' );
+			$.ajax( {
+				type: 'post',
+				dataType: 'json',
+				url: wpsc_ajax.ajax_url,
+				data: {
+					// wp ajax action
+					action: 'ajax-delete-cache',
+
+					path: wpsc_ajax.path,
+					admin: wpsc_ajax.admin,
+
+					// send the nonce along with the request
+					nonce: wpsc_ajax.nonce,
+				},
+				success: function () {
+					if ( wpsc_ajax.admin === '1' ) {
+						// eslint-disable-next-line no-console
+						console.log( 'Deleted entire cache' );
+					} else {
+						// eslint-disable-next-line no-console
+						console.log( 'Deleted cache for this page and reloading' );
+					}
+					window.location.reload();
+				},
+				complete: function () {
+					$( '#wp-admin-bar-delete-cache' ).fadeIn( 'slow' );
+				},
+			} );
+			return false;
+		} );
+	} );
+} )( jQuery );