feat: Add localhost license bypass for development

- License check bypassed on localhost, 127.0.0.1, ::1
- Also bypassed for .local, .test, .localhost, .dev.local TLDs
- Bump version to 0.5.1

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

includes/License/Manager.php

@@ -421,15 +421,50 @@ final class Manager {
 	/**
 	 * Check if the license is currently valid.
 	 *
-	 * Uses cached status for performance.
+	 * Uses cached status for performance. Bypasses license check on localhost.
 	 *
 	 * @return bool
 	 */
 	public static function is_license_valid(): bool {
+		// Bypass license check on localhost for development.
+		if ( self::is_localhost() ) {
+			return true;
+		}
+
 		$status = get_option( self::OPTION_LICENSE_STATUS, 'unchecked' );
 		return 'valid' === $status;
 	}
 
+	/**
+	 * Check if the current site is running on localhost.
+	 *
+	 * @return bool
+	 */
+	public static function is_localhost(): bool {
+		$host = wp_parse_url( home_url(), PHP_URL_HOST );
+
+		// Common localhost identifiers.
+		$localhost_hosts = array(
+			'localhost',
+			'127.0.0.1',
+			'::1',
+		);
+
+		if ( in_array( $host, $localhost_hosts, true ) ) {
+			return true;
+		}
+
+		// Common local development TLDs.
+		$local_tlds = array( '.local', '.test', '.localhost', '.dev.local' );
+		foreach ( $local_tlds as $tld ) {
+			if ( str_ends_with( $host, $tld ) ) {
+				return true;
+			}
+		}
+
+		return false;
+	}
+
 	/**
 	 * Get the license key.
 	 *