Create a page template to display categories

category-template.php

<?php
/* Template Name: Category Template */ 

if ( ! defined( 'ABSPATH' ) ) {
	exit; // Exit if accessed directly.
}

get_header(); ?>

	<div id="primary" <?php generate_do_element_classes( 'content' ); ?>>
		<main id="main" <?php generate_do_element_classes( 'main' ); ?>>
			<?php
			/**
			 * generate_before_main_content hook.
			 *
			 * @since 0.1
			 */
			do_action( 'generate_before_main_content' );
            
            $categories = get_categories();
            foreach ( $categories as $cat ) { ?>

                <?php do_action( 'generate_before_term' ); ?>

                <div class="category" id ="category-<?php echo $cat->term_id; ?>">
                    <a class="cat-link" href="<?php echo get_category_link( $cat->term_id ); ?>">
                        <?php do_action( 'generate_before_term_title' ); ?>
                        <h2 class="cat-title"><?php echo $cat->name; ?></h2>
                        <?php do_action( 'generate_before_term_desc' ); ?>
                        <p class="cat-description"><?php echo $cat->description; ?></p>
                        <?php do_action( 'generate_after_term_desc' ); ?>
                    </a>
                </div>

                <?php do_action( 'generate_after_term' ); ?>


            <?php } 

			/**
			 * generate_after_main_content hook.
			 *
			 * @since 0.1
			 */
			do_action( 'generate_after_main_content' );
			?>
		</main><!-- #main -->
	</div><!-- #primary -->

	<?php
	/**
	 * generate_after_primary_content_area hook.
	 *
	 * @since 2.0
	 */
	do_action( 'generate_after_primary_content_area' );

	generate_construct_sidebars();

get_footer();