Added input sections stubs, Added textarea basic rules

Update index.php, inputs.php, and 3 more files...

htdocs/parts/examples/inputs.php

@@ -0,0 +1,37 @@
+<?php
+// Making sure the file is included and not accessed directly.
+if (basename(__FILE__) == basename($_SERVER["SCRIPT_FILENAME"])) {
+    header('HTTP/1.1 403 Forbidden');
+    die();
+}
+?>
+
+<a id="examples-inputs"></a>
+<div class="p-xs b r-s bkgd-grid mt-m">
+    <h2 class="t-w-500 t-size-14">Inputs
+        <i class="fa-solid fa-pen-to-square f-right"></i>
+    </h2>
+</div>
+<section class="p-s">
+
+    <h3 class="t-w-500 t-size-12 my-xs mt-xxs">Basic inputs</h3>
+
+    <div class="px-s mb-m">
+        <label for="demo-core-text">Text Input: </label>
+        <input id="demo-core-text" type="text" value="Lorem ipsum" class="p-xxs border r-m">
+        <code class="d-block p-xxs border r-s mt-xs bkgd-gray">
+            label+input[type=text]<b>.p-xxs.border.r-m</b>
+        </code>
+    </div>
+
+    <div class="px-s mb-m">
+        <label for="demo-core-textarea"></label>
+        <textarea id="demo-core-textarea" rows="8" class="p-xxs border r-m w-full ta-resize-v">Lorem Ipsum</textarea>
+        <code class="d-block p-xxs border r-s mt-xs bkgd-gray">
+            label+textarea<b>.p-xxs.border.r-m.w-full.ta-resize-v</b>
+        </code>
+
+    </div>
+
+    <p class="mt-m t-bold">TODO: Add other types</p>
+</section>