Pesty russian detection (#76)

In this PR I made russian detection more Pesty.

- We should use `RussianNormalizer`.
- Add `.php` extension at the end of file name.
- Does not use `pest-plugin-profanity` syntax and does not feel as Pest.
- In case of exception it throws the global `\Exception`.
- Does not display the profanity the way the package do (See image).
```php
RussianNormalizer::assertNoRussianProfanity('Tests\Fixtures\HasExplicitRussianProfanity.php');
```

![image](https://github.com/user-attachments/assets/fb51e337-768d-49d3-b0f8-a88287515751)

- More Pesty and clean.
```php
expect('Tests\Fixtures\HasExplicitRussianProfanity')->toHaveNoProfanity(language: 'ru');
```

![image](https://github.com/user-attachments/assets/5e4b785f-f95c-49f9-820e-379691df1de1)

PS: I am not sure about the masked profanities on
`HasMaskedRussianProfanity` should they be detected or not. They are not
detected at the time. If it's the case I think I should remove that
file.

Author: faissaloux

src/Support/Russian.php

@@ -0,0 +1,65 @@
+<?php
+
+declare(strict_types=1);
+
+namespace JonPurvis\Profanify\Support;
+
+final class Russian
+{
+    private static string $pattern = '/[А-Яа-яЁё]+/u';
+
+    private bool $detected = false;
+
+    /** @var array<string, string> */
+    private static array $normalized = [];
+
+    /** @var array<int|string, string> */
+    private static array $toNormalize = [
+        '3' => 'з', '4' => 'ч', '6' => 'б',
+        'a' => 'а', 'c' => 'с', 'e' => 'е', 'o' => 'о', 'p' => 'р', 'x' => 'х', 'k' => 'к',
+        'A' => 'д', 'r' => 'г', 'H' => 'н', 'M' => 'м', 'T' => 'т', 'B' => 'в',
+    ];
+
+    public function is(string $text): bool
+    {
+        if ((bool) preg_match(self::$pattern, $text)) {
+            $this->detected = true;
+        }
+
+        return $this->detected;
+    }
+
+    public function isDetected(): bool
+    {
+        return $this->detected;
+    }
+
+    public static function pattern(): string
+    {
+        return self::$pattern;
+    }
+
+    public static function normalize(string $text): string
+    {
+        preg_match_all('/\w+/u', $text, $words);
+        $toNormalizeKeysString = implode('', array_keys(self::$toNormalize));
+
+        foreach ($words[0] as $word) {
+            if (strpbrk($word, $toNormalizeKeysString)) {
+                $normalized = strtr($word, self::$toNormalize);
+                self::$normalized[$word] = $normalized;
+            }
+        }
+
+        return str_replace(array_keys(self::$normalized), array_values(self::$normalized), $text);
+    }
+
+    /**
+     * @param  array<string>  $profanities
+     * @return array<string>
+     */
+    public static function backToOrigin(array $profanities): array
+    {
+        return array_map(fn ($profanity): string => array_search($profanity, self::$normalized) ?: $profanity, $profanities);
+    }
+}

src/Support/RussianNormalizer.php

@@ -7,4 +7,9 @@
 class HasExplicitRussianProfanity
 {
     public string $bad = 'Это полная хуйня!';
+
+    public function е6ёт()
+    {
+        // Comment...
+    }
 }