[Table Rate Shipping] Adds support to override the shipping table list template by copying it to a theme

trs-table-list-template-override.php

<?php

/**
 * Makes it possible to override the TRS table list template by copying
 * it to `table-rate-shipping/shipping-table-list.php` in a theme.
 *
 * @param string $template_path Path to TRS table list template.
 *
 * @return string Template path.
 */
function filter_trs_tables_template_path( $template_path ) {
    $override = locate_template( array( 'table-rate-shipping/shipping-table-list.php' ) );

    if ( $override ) {
        $template_path = $override;
    }

    return $template_path;
}

add_filter( 'trs_table_list_view_path', 'filter_trs_tables_template_path' );