feat: Introduce simple.php example and remove previous example files and configuration.

Author: CodeWithKyrian

examples/.gitignore

@@ -2,7 +2,7 @@
 
 declare(strict_types=1);
 
-require './vendor/autoload.php';
+require '../vendor/autoload.php';
 
 use Codewithkyrian\ChromaDB\ChromaDB;
 use Codewithkyrian\ChromaDB\Embeddings\JinaEmbeddingFunction;
@@ -22,7 +22,6 @@
     embeddingFunction: $embeddingFunction
 );
 
-
 $collection->add(
     ids: ['1', '2', '3'],
     documents: ['He seems very happy', 'He was very sad when we last talked', 'She made him angry']