Added GitHub Pages steps, Automated demo page (#2)

* Testing PHP Rendering workflow
Update php-render.yml, sass-compile.yml, and nibblepoker.scss

* Fixed CWD in PHP workflow
Update php-render.yml

* Removed beautifier step
Update php-render.yml

* Added artifact retrieval
Update php-render.yml and sass-compile.yml

* Attempt 1 to fix broken triggers
Update php-render.yml

* Combined workflows, Screw this noise
Update build-all.yml, php-render.yml, and sass-compile.yml

* Fixed paths for GitHub Pages
Update index.php, intro.php, and sidebar.php

* Removed trash step, Fixed last faulty path
Update build-all.yml and cards.php

htdocs/parts/intro.php

@@ -7,6 +7,7 @@ if(basename(__FILE__) == basename($_SERVER["SCRIPT_FILENAME"])) {
 global $root_path;
 ?>
 
+<a id="intro"></a>
 <div class="p-xs b r-s bkgd-grid">
     <h2 class="t-w-500 t-size-14">Introduction</h2>
 </div>