Image size (height/width) arguments are not used in output for custom_logo

[BinaryKitten]

when setting up the custom logo in theme support, it allows for height/width to be set.

When outputting, the default and only option for the output (via the_custom_logo() ) is "full" (as set in the get_custom_logo function call)

This is carry over from commit
[37135] for #36327

Fetch the height and width from the custom logo settings. If present, pass them in as a size parameter to wp_get_attachment_image().

Trac ticket: https://core.trac.wordpress.org/ticket/37972

To fetch the height and width from the custom logo settings in WordPress and pass them as a size parameter to wp_get_attachment_image(), you can use the following approach:

1. Get the Custom Logo ID: Use get_theme_mod( 'custom_logo' ) to retrieve the custom logo ID.
2. Get the Image Metadata: Use wp_get_attachment_metadata() to fetch the logo’s width and height.
3. Pass Dimensions to wp_get_attachment_image(): Once you have the dimensions, pass them in the size parameter when calling wp_get_attachment_image().

Here’s an example code snippet:

// Get the custom logo ID
$custom_logo_id = get_theme_mod( 'custom_logo' );

// Check if a custom logo is set
if ( $custom_logo_id ) {
    // Get the logo metadata
    $logo_metadata = wp_get_attachment_metadata( $custom_logo_id );

    // Extract width and height if available
    $width = $logo_metadata['width'] ?? '';
    $height = $logo_metadata['height'] ?? '';

    // Pass width and height to wp_get_attachment_image as an array
    echo wp_get_attachment_image( $custom_logo_id, [ $width, $height ] );
}

_{<sup style="font-size: 0.1em;">​.</sup>}

This code checks if a custom logo exists, retrieves its dimensions, and then passes those dimensions as an array to wp_get_attachment_image(). This approach ensures the custom logo appears at its correct size.