Implement attr, brotli, bzip2 build for unix

src/Package/Library/bzip2.php

@@ -0,0 +1,25 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Package\Library;
+
+use StaticPHP\Attribute\Package\BuildFor;
+use StaticPHP\Attribute\Package\Library;
+use StaticPHP\Package\LibraryPackage;
+use StaticPHP\Package\PackageBuilder;
+
+#[Library('bzip2')]
+class bzip2
+{
+    #[BuildFor('Linux')]
+    #[BuildFor('Darwin')]
+    public function build(LibraryPackage $lib, PackageBuilder $builder): void
+    {
+        shell()->cd($lib->getSourceDir())->initializeEnv($lib)
+            ->exec("make PREFIX='{$lib->getBuildRootPath()}' clean")
+            ->exec("make -j{$builder->concurrency} PREFIX='{$lib->getBuildRootPath()}' libbz2.a")
+            ->exec('cp libbz2.a ' . $lib->getLibDir())
+            ->exec('cp bzlib.h ' . $lib->getIncludeDir());
+    }
+}