HtmlBuilder classes for Object, Array, String Replace build

Object build is a replicata from the JS one
Array is similar but build on pure Array elements
String replace is just a simple string replacer for now

General\Error for overall error handling
General\Settings for Object/Array based checks and settings

4dev/tests/Template/CoreLibsTemplateHtmlBuilderBlockTest.php

@@ -0,0 +1,27 @@
+<?php
+
+declare(strict_types=1);
+
+namespace tests;
+
+use PHPUnit\Framework\TestCase;
+use CoreLibs\Template\HtmlBuilder\Block;
+
+/**
+ * Test class for Template\HtmlBuilder\Block
+ * @coversDefaultClass \CoreLibs\Template\HtmlBuilder\Block
+ * @testdox \CoreLibs\Template\HtmlBuilder\Block method tests
+ */
+final class CoreLibsTemplateHtmlBuilderBlockTest extends TestCase
+{
+	public function testCreateBlock(): void
+	{
+		$el = Block::cel('div', 'id', 'content', ['css'], ['onclick' => 'foo();']);
+		$this->assertEquals(
+			'<div id="id" class="css" onclick="foo();">content</div>',
+			Block::buildHtml($el)
+		);
+	}
+}
+
+// __END__