Move to Symfony Flex

The structure changed completely.
Bundles are gone. Everything is flatten in the folder `src`.
I separated import & api controllers to avoid _pollution_ in the main controller folder.

tests/Tools/UtilsTest.php

@@ -0,0 +1,39 @@
+<?php
+
+namespace App\Tests\Tools;
+
+use App\Tools\Utils;
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Finder\Finder;
+
+class UtilsTest extends TestCase
+{
+    /**
+     * @dataProvider examples
+     */
+    public function testCorrectWordsCountForDifferentLanguages($filename, $text, $expectedCount)
+    {
+        static::assertSame((float) $expectedCount, Utils::getReadingTime($text), 'Reading time for: ' . $filename);
+    }
+
+    public function examples()
+    {
+        $examples = [];
+        $finder = (new Finder())->in(__DIR__ . '/samples');
+        foreach ($finder->getIterator() as $file) {
+            preg_match('/-----CONTENT-----\s*(.*?)\s*-----READING_TIME-----\s*(.*)/sx', $file->getContents(), $match);
+
+            if (3 !== \count($match)) {
+                throw new \Exception('Sample file "' . $file->getRelativePathname() . '" as wrong definition, see README.');
+            }
+
+            $examples[] = [
+                $file->getRelativePathname(),
+                $match[1], // content
+                $match[2], // reading time
+            ];
+        }
+
+        return $examples;
+    }
+}