Add settings button into the plugins

functions.php

	/**
	 * Add Settings link to plugins area.
	 *
	 * @since    1.0.0
	 *
	 * @param array  $links Links array in which we would prepend our link.
	 * @param string $file  Current plugin basename.
	 * @return array Processed links.
	 */
	function modify_plugin_action_links( $links, $file ) {

		// Return normal links if not BuddyPress.
		if ( WORDPRESS_PLUGIN_BOILERPLATE_PLUGIN_BASENAME !== $file ) {
			return $links;
		}

		// Add a few links to the existing links array.
		return array_merge(
			$links,
			array(
				'settings'      => '<a href="' . esc_url( admin_url( 'admin.php?page=bp-settings' ) ) . '">' . esc_html__( 'Settings', 'wordpress-plugin-boilerplate' ) . '</a>',
			)
		);
	}


$this->loader->add_action( 'plugin_action_links', $plugin_admin, 'modify_plugin_action_links', 10, 2 );

Will put this function into the Wordpress_Plugin_Boilerplate_Admin class and hook inside the define_admin_hooks method