Apply coding standards tooling

.gitignore

@@ -1,3 +1,4 @@
 /vendor/
 /psalm.xml
 /.phpunit.cache/
+/.phpcs-cache

composer.json

@@ -25,11 +25,15 @@
         "symfony/console": "^6.4"
     },
     "require-dev": {
+        "doctrine/coding-standard": "^12.0",
         "phpunit/phpunit": "^10.5",
         "vimeo/psalm": "^5.22"
     },
     "config": {
         "sort-packages": true,
-        "preferred-install": "dist"
+        "preferred-install": "dist",
+        "allow-plugins": {
+            "dealerdirect/phpcodesniffer-composer-installer": true
+        }
     }
 }

phpcs.xml.dist

@@ -0,0 +1,16 @@
+<?xml version="1.0"?>
+<ruleset name="PIE Coding Standard">
+    <config name="php_version" value="80100"/>
+    <arg value="p"/>
+    <arg value="s"/>
+    <arg name="colors"/>
+    <arg name="cache" value=".phpcs-cache"/>
+
+    <file>bin/pie</file>
+    <file>src</file>
+    <file>test/unit</file>
+
+    <rule ref="Doctrine">
+        <exclude name="Generic.Files.LineLength.TooLong"/>
+    </rule>
+</ruleset>

src/Command/DownloadCommand.php

@@ -18,6 +18,7 @@ final class DownloadCommand extends Command
     public function execute(InputInterface $input, OutputInterface $output): int
     {
         $output->writeln('<info>to do</info>'); // @todo
+
         return Command::SUCCESS;
     }
 }

test/unit/Command/DownloadCommandTest.php

@@ -15,7 +15,7 @@ class DownloadCommandTest extends TestCase
 {
     public function testDownloadCommand(): void
     {
-        $input = $this->createMock(InputInterface::class);
+        $input  = $this->createMock(InputInterface::class);
         $output = $this->createMock(OutputInterface::class);
 
         $output->expects(self::once())