A WordPress plugin that contains many blocks to build your RundizStrap theme, or you can use it with any Bootstrap 5 themes.
You can manually set CSS class(es) by referring to the Bootstrap document.
Supported custom HTML attributes like <code>data-*</code>, <code>aria-*</code> in most blocks.
Available blocks:
<ul>
<li>Customizable div</li>
<li>Layout container</li>
<li>Layout row</li>
<li>Layout column</li>
<li>Search (for navbar and anywhere else)</li>
<li>Pagination (for list posts)</li>
<li>Navbar container</li>
<li>Navbar toggler button (for responsive toggler)</li>
<li>Navbar responsive wrapper (collapse, offcanvas)</li>
<li>Navbar navigation (display menu items)</li>
<li>Button (link, or button)</li>
<li>Comment form</li>
<li>Post navigation (display next, previous post)</li>
</ul>
Tested up to PHP 8.5.
The original source code is on GitHub ( https://github.com/Rundiz-WP/rundizstrap-companion ). 
It contains the original source of blocks before compile/build and blocks that are already built, the build tools via Node package (package.json).

RundizStrap Companion

A plugin that contains blocks for the Bootstrap theme that help you customize your site in your style. All blocks are based on Bootstrap CSS.

Phil Ewels

A custom post type for choosing images and content which outputs a <a href="http://getbootstrap.com/javascript/#carousel" rel="nofollow ugc">carousel</a> from <a href="http://www.getbootstrap.com" rel="nofollow ugc">Twitter Bootstrap</a> using the shortcode <code>[image-carousel]</code>.
The plugin assumes that you’re already using Bootstrap, so you need to load the Bootstrap javascript and CSS separately.
<ul>
<li><a href="http://getbootstrap.com/" rel="nofollow ugc">Download Twitter Bootstrap</a></li>
<li><a href="http://www.bootstrapcdn.com/" rel="nofollow ugc">Bootstrap CDN</a> (hotlink CSS and javascript files)</li>
<li><a href="https://getbootstrap.com/docs/4.4/components/carousel/" rel="nofollow ugc">Bootstrap Carousel in action</a></li>
</ul>
This plugin is available from the WordPress Plugins Directory: <a href="https://wordpress.org/plugins/cpt-bootstrap-carousel/" rel="ugc">https://wordpress.org/plugins/cpt-bootstrap-carousel/</a>. 
The source code is maintained on GitHub: <a href="https://github.com/ewels/cpt-bootstrap-carousel" rel="nofollow ugc">https://github.com/ewels/cpt-bootstrap-carousel</a>.
<h4>Shortcode Options</h4>
As of version 1.5, nearly all of these options can be set in the CPT Bootstrap Carousel Settings page. However, if you’d like different settings for different carousels, you can override these by using shortcode options…
<ul>
<li>
<code>interval</code> (default 5000)
<ul>
<li>Length of time for the caption to pause on each image. Time in milliseconds.</li>
<li><code>[image-carousel interval="12000"]</code></li>
</ul>
</li>
<li>
<code>showcaption</code> (default true)
<ul>
<li>Whether to display the text caption on each image or not. <code>true</code> or <code>false</code>.</li>
<li><code>[image-carousel showcaption="false"]</code></li>
</ul>
</li>
<li>
<code>showcontrols</code> (default true)
<ul>
<li>Whether to display the control arrows or not. <code>true</code> or <code>false</code>.</li>
<li><code>[image-carousel showcontrols="false"]</code></li>
</ul>
</li>
<li>
<code>orderby</code> and <code>order</code> (default <code>menu_order</code> <code>ASC</code>)
<ul>
<li>What order to display the posts in. Uses <a href="https://codex.wordpress.org/Class_Reference/WP_Query#Order_.26_Orderby_Parameters" rel="nofollow ugc">WP_Query terms</a>.</li>
<li><code>[image-carousel orderby="rand"]</code></li>
<li><code>[image-carousel orderby="date" orderby="DESC"]</code></li>
</ul>
</li>
<li>
<code>category</code> (default all)
<ul>
<li>Filter carousel items by a comma separated list of carousel category slugs.</li>
<li><code>[image-carousel category="homepage,highlights"]</code></li>
</ul>
</li>
<li>
<code>id</code> (default all)
<ul>
<li>Specify the ID of a specific carousel post to display only one image.</li>
<li>Find the image ID by looking at the edit post link, eg. post 109 would be <code>/wp-admin/post.php?post=109&action=edit</code></li>
<li><code>[image-carousel id="109"]</code></li>
</ul>
</li>
<li>
<code>twbs</code> (default 2)
<ul>
<li>Output markup for Twitter Bootstrap Version 2 or 3.</li>
<li><code>[image-carousel twbs="3"]</code></li>
</ul>
</li>
</ul>
<h4>Credits</h4>
This plugin was written by @tallphil with help and suggestions from several others including (but not limited to) @reddo, @joshgerdes, @atnon, @grahamharper, @rchq, @oheijo, @smtk, @cla63, @cookierebes and @sipman.
The Serbo-Croation translation was kindly provided by Borisa Djuraskovic from <a href="http://www.webhostinghub.com" rel="nofollow ugc">http://www.webhostinghub.com</a>
The Spanish translation was provided by Chema Bescós from IBIDEM GROUP (<a href="https://www.ibidemgroup.com" rel="nofollow ugc">https://www.ibidemgroup.com</a>)
<h4>Contributing</h4>
If you would like to contribute to this plugin, please make a personal fork of the GitHub repository and then submit a pull request. For more details please see the <a href="https://github.com/ewels/CPT-Bootstrap-Carousel/CONTRIBUTING.md" rel="nofollow ugc">contributing guide</a>.

CPT Bootstrap Carousel

A custom post type for choosing images and content which outputs Bootstrap Image Carousel (slider) from the [image-carousel] shortcode.

RundizStrap Companion vs CPT Bootstrap Carousel