Add WsLog::e for error-level logs

Author: john-shaffer

src/WsLog.php

@@ -36,6 +36,13 @@ public static function d( string $text ): void {
         self::l( $text, 'debug' );
     }
 
+    /**
+     * Log an error message
+     */
+    public static function e( string $text ): void {
+        self::l( $text, 'error' );
+    }
+
     /**
      * Log an error message and return a throwable exception
      *
@@ -49,7 +56,7 @@ public static function ex(
         int $code = 0,
         ?Throwable $previous = null
     ): StaticDeployException {
-        self::l( $message, 'error' );
+        self::e( $message );
         return new StaticDeployException(
             $message,
             $code,