Integrate pest-plugins with 2 interfaces

integrate pest-plugin package and remove core coverage stuff

tests/Unit/Console/Coverage.php

@@ -1,24 +0,0 @@
-<?php
-
-use Pest\Console\Coverage;
-
-it('generates coverage based on file input', function () {
-    assertEquals([
-        '4..6', '102',
-    ], Coverage::getMissingCoverage(new class() {
-        public function getCoverageData(): array
-        {
-            return [
-                1   => ['foo'],
-                2   => ['bar'],
-                4   => [],
-                5   => [],
-                6   => [],
-                7   => null,
-                100 => null,
-                101 => ['foo'],
-                102 => [],
-            ];
-        }
-    }));
-});